Once, long ago, I photographed a skydiving class. It was composed mostly of college students fulfilling a fantasy of jumping out of a perfectly good airplane. They learned a little about aerodynamics, a little about physics and a lot about what to do if something goes wrong – i.e., twisted chute.
During this very sober discussion, one of the students raised their hand with a question. “Once we cut away the main, how long do we have to pull the reserve chute?” The instructor stared at her and responded simply, “The rest of your life.”