This is an underinsured motorist coverage case. Appellants Glenn and Elizabeth Hisaw filed suit in Carroll County Circuit Court seeking coverage under five separate State Farm policies, two issued to Glenn Hisaw personally and the other three issued to the Inspiration Point Volunteer Fire Department, of which Hisaw was chief. The trial court granted summary judgment to State Farm, ruling that the Hisaws were not entitled to coverage under any of the policies. We affirm the court’s ruling on the fire department policies but reverse and remand as to Hisaw’s personal policies.
On July 2, 1996, Glenn Hisaw received a radio dispatch regarding a one-car accident in Carroll County. He drove to the scene in his personal vehicle and began to render assistance as required. The accident involved a van driven by Clarence Struthers. Struthers had driven the van off the road, and it came to rest at a downhill angle among a stand of trees. It was later determined that Struthers had a blood-alcohol content of .213.
After Hisaw had assisted in removing Struthers from the scene, he returned to the van to obtain its registration information. One of the van’s side doors (which opened toward the back of the van) had been left ajar. As Hisaw stood beside the van, the door closed, due to the effects of gravity, and struck him. Although Hisaw continued with his duties at the scene, he later sought medical attention for neck and back injuries.
*242In 1997, Hisaw and his wife sued Struthers and settled for Struthers’s policy limits of $25,000. The Hisaws then sued State Farm for underinsured-motorist (UIM) benefits on the five abovementioned policies. With regard to the three fire department policies, State Farm contended that Hisaw was not an insured. With regard to all five policies, State Farm asserted that no coverage was owed because Hisaw’s injuries were not “caused by accident arising out of the operation, maintenance or use of an underinsured motor vehicle.” The trial judge agreed with State Farm and entered summary judgment in its favor on all policies. The Hisaws appeal from that ruling.
On appellate review of a summary judgment, we determine whether the trial court’s grant of summary judgment was appropriate based on whether the evidence presented by the moving party left a material question of fact unanswered. Sweeden v. Farmers Ins. Group, 71 Ark. App. 381, 30 S.W.3d 783 (2000). The moving party always bears the burden of sustaining a motion for summary judgment. Id. All proof must be viewed in the light most favorable to the resisting party, and any doubts must be resolved against the moving party. Id. In a case where there are no disputed facts, our review focuses on the trial court’s application of the law to the facts. Id.
The language in an insurance policy is to be construed in its plain, ordinary, and popular sense. Norris v. State Farm Fire & Cas. Ins. Co., 341 Ark. 360, 16 S.W.3d 242 (2000). It is to be construed strictly against the insurer, who chooses its language. See id. The construction and legal effect of written contracts are matters to be determined by the court, not by the jury, except when the meaning of the language depends upon disputed extrinsic evidence. Smith v. Prudential Prop. & Cas. Ins. Co., 340 Ark. 335, 10 S.W.3d 846 (2000). If the language employed in the policy is ambiguous or there is doubt and uncertainty as to its meaning and it is fairly susceptible to two interpretations, one favorable to the insured and the other favorable to the insurer, the former will be adopted. Id.; Home Mut. Fire Ins. Co. v. Jones, 63 Ark. App. 221, 977 S.W.2d 12 (1998).
*243We first explore Hisaw’s status as an insured under the three fire department policies. The policies were issued on three separate vehicles and provided $100,000/$300,000 UHVb coverage. Although the record does not contain the declarations pages for these policies, the policy certifications state that the named insured was the “Inspiration Point Volunteer Fire Association” and that Glen Flisaw ,was not listed as a driver or named insured. The policy language defined an insured for UIM purposes as follows:
Insured — means the person or persons covered by . . . under-
insured motor vehicle This is:
1. The first person named in the declarations;
2. His or her spouse;
3. Their relatives; and
4. Any other person while occupying:
a. Your car, a temporary substitute car, a newly acquired car or a trailer attached to such a car. Such vehicle has to be used within the scope of the consent of you or your spouse; or
b. A car not owned by you, your spouse, or any relative, or a trailer attached to such a car. It has to be driven by the first person named in the declarations or that person’s spouse and within the scope of the owner’s consent.
Such other person occupying a vehicle used to carry persons for a charge is not an insured.
5. Any person entitled to recover damages because of bodily injury to an insured under 1 through 4 above.
The trial court ruled that Glenn Flisaw was not a named insured under the policies, nor did he fit into any of the categories listed above. Flisaw does not quarrel with that specific ruling, but he argues that he should be considered an insured by virtue of the fact that he was a member of the Inspiration Point Volunteer Fire Association. He cites Baskins v. United Mine Workers, 150 Ark. 398, 234 S.W. 464 (1921), for the proposition that an unincorporated association has no legal identity distinct from that of its *244members. In light of that holding, he contends, if an unincorporated association is a named insured, its members are necessarily insureds.
We do not believe that the facts necessary to a resolution of this argument were sufficiently developed below. Although Hisaw argued during the summary judgment hearing that the firefighters and the association were one and the same, he did not specifically contend that the fire department was an unincorporated association. As a result, the record contains no information as to how the fire department was organized. Further, the trial court made no ruling regarding the organization of the fire department. Because these important gaps in the development of this issue exist, we decline to consider it as a basis for reversal. Our courts have said numerous times that we will not consider an issue that was not fully developed at the trial level. See Knowlton v. Ward, 318 Ark. 867, 889 S.W.2d 721 (1994); Hastings v. Planters & Stockmen Bank, 307 Ark. 34, 818 S.W.2d 239 (1991); Lee v. Hot Springs Village Golf. Sch., 58 Ark. App. 293, 951 S.W.2d 315 (1997). Therefore, we will not reverse the trial court’s grant of summary judgment to State Farm on the three fire department policies.
We turn now to Hisaw’s two personal policies, each of which provided $50,000/$100,000 in UIM benefits. The UIM coverage parts read as follows:
We will pay for damages for bodily injury an insured is legally entitled to collect from the owner or driver of an underinsured motor vehicle. The bodily injury must be sustained by an insured and caused by accident arising out of the operation, maintenance or use of an underinsured motor vehicle, (underlined emphasis added).1
At the time Hisaw sustained his injury, the “underinsured motor vehicle” (the Struthers van) was stationary, having been wrecked thirty minutes to two hours earlier. The van’s operator was no longer at the scene. Hisaw was not attempting to operate or move *245the van, but was merely standing beside it when one of the doors closed on him and injured him. The question is whether, given those facts, Hisaw’s injury was “caused by an accident arising out of the operation, maintenance or use of” (hereafter referred to for convenience as simply the use of) the van.
The phrase “arising out of” has been given a broad meaning by the courts. See 6B John Appleman, Insurance Law and Practice § 4317 (1979). It is a general and comprehensive phrase that means originating from, growing out of, or flowing from. Allied Mut. Ins. Co. v. Action Elec. Co., 256 Neb. 691, 593 N.W.2d 275 (1999). To “arise out of” the use of a vehicle, a victim’s injuries need not rise to the level of being proximately caused by the use of the vehicle; it is enough that “but for” causation, i.e., a cause and result relationship between the use of the vehicle and the injuries, exists. See State Farm Mut. Auto. Ins. Co. v. LaSage, 262 Ark. 631, 559 S.W.2d 702 (1978).
An example of the comprehensive application of such policy language may be seen in Owens v. Ocean Accident and Guarantee Corp., 194 Ark. 817, 109 S.W.2d 928 (1937). There, the supreme court addressed a similar policy provision that required the victim’s injuries to be “caused by the ownership, maintenance, or use of” the insured vehicle. The insurer had issued a liability policy to a funeral home that owned an ambulance. While on a call, an ambulance attendant went into a woman’s home, placed her on a cot, and negligently permitted her to slide ofF before she was placed in the ambulance. The insurer contended that the woman’s injuries were not caused by the use of the vehicle. The supreme court held that carrying the woman from her home to the ambulance was an essential transaction in connection with the use of the automobile as an ambulance and thus allowed coverage.
We agree with Hisaw that, under the broad interpretation required by our supreme court, there was a causal connection between Struthers’s use of the van and Hisaw’s injuries. But for Struthers’s use and operation of the van in such a manner as to drive it off the road, Hisaw would not have responded to the accident, undertaken his official duties, and ultimately received his *246injuries.2 Further, the fact that his injuries were inflicted by the underinsured vehicle itself takes this case out of the realm of those decisions in which the vehicle was the mere situs of an injury that could just as easily have occurred elsewhere. See, e.g., Carter v. Grain Dealers Mut. Ins. Co., 10 Ark. App. 16, 660 S.W.2d 952 (1983) (holding that victim’s injuries did not arise out of the use of a motor vehicle when the victim received injuries from a gun fired in the vehicle).
In light of the foregoing, we reverse the trial court’s entry of summary judgment to State Farm on Hisaw’s personal insurance policies and hold that Hisaw’s injuries arose out of the operation, maintenance, or use of the underinsured vehicle.3
*247Appellants also contend that the trial court erred in granting summary judgment on Mrs. Hisaw’s loss-of-consortium claim. State Farm argued below that Mrs. Hisaw could not recover for loss of consortium under any of the five policies because the policies only pay UIM benefits for “bodily injury,” defined as follows: “bodily injury to a person and sickness, injury, or death which results from it.” The trial court, having determined that no coverage was owed under the policies for other reasons, never made a ruling on this issue. Therefore, we need not address it on appeal. Sturgis v. Skokos, 335 Ark. 41, 977 S.W.2d 217 (1998). However, we do point out that two provisions contained in Hisaw’s personal policies may be relevant to this issue on remand. The policies provide that the UIM “each person” amounts fisted on the declarations page is the amount for all damages due to bodily injury to one person, which “includes all injury and damages to others resulting from this bodily injury.” (Emphasis added.) Further, the UIM definition of an insured includes, in paragraph five, any person entitled to recover damages because of bodily injury to an insured.
For the reasons stated, we reverse and remand this case on issues pertaining to Hisaw’s personal policies and affirm on the issues pertaining to the fire department policies.4
Affirmed in part; reversed and remanded in part.
Stroud, C.J., and Robbins, J., agree.
Bird, Crabtree, and Baker, JJ., concur in part and dissent in part.