Utah spends a pretty hefty montage learning how to surf so he can integrate himself into the surfing community, where he attracts the attention and gains the respect and trust of the alpha male of surfing, Bodhi (Patrick Swayze), and his gang (which incidentally is also the gang that's responsible for the bank robberies). Eventually, Utah realizes that the surfers are the robbers, and he even reluctantly accompanies the thieves on one bank robbery that involves skydiving. It's that kind of movie.
When our grand kids ask us what the 90s were like, we will show them this movie and nothing else.
Later, when Bodhi realizes that Utah is in the FBI, he decides to kidnap Utah's girlfriend and make a getaway in a small airplane, because the producers could only secure transportation permits for surfboards, planes and parachutes, for some reason. Utah pursues Bodhi, who exercises his one in-plane escape option: He skydives the fuck out of there with his other criminal surfer friends, leaving Utah out of luck without a chute.
Sure, there is still a pilot and no immediate danger to his life, but Utah is no quitter (or thinker, or planner, or good at his job). Armed with a pistol, Utah jumps out of the plane, totally chuteless and scared shitless, and catching up with Bodhi in mid-air, puts Bodhi at gun point, shares his chute and eventually lands safely. We won't spoil the ending because we don't need to in order to get to the point ...