forgot key moment - you side at open door with feet dangling, then with signal, step out holding onto the wing strut, feet fluttering behind. You count then slide hands off strut and slip backward downward. After 3 seconds or so and tether pull, look up. Should see a billowing chute opening. If not, just look down and wait for alternate landing. (actually we had a safety backup chute where you land, roll and twist to not break your legs and back like in ww2. If it works, fella who packed it gets a “save”. 3000 saves or so for the mean jump master at the time with one fatality in many years, always “multiple, flagrant, violations of procedures and attention.”
My son skydives. Been doing it for several years.