Only 3 parachutes ~ the Michael J. Fox version
You’ve been given 3 parachutes, but there are 4 people who need them. Who will you not give one to: Alex P. Keaton, Marty McFly, Deputy Mayor Mike Flaherty, or Brentley Foster/Carlton Whitfield?
(Of course, all 4 of them are up really super duper high in the air, and the parachute is truly the only way to save them.)