Michael Phelps grabbed a parachute and, looking at the others said..."I'm the greatest athlete in the land, so I must save myself.", after which he jumped.
Brad Pitt grabbed one and, looking at the others said..."I'm the sexiest man alive, so I must save myself.", after which he jumped.
Barack Obama grabbed a parachute saying "I'm the smartest President who ever lived." before jumping.
The old preacher looked at the young boy scout and said ... "Boy, I've lived a long and full life, you take the last parachute and jump to safety." ... to which the young buy scout replied ... "Don't worry sir, the smartest President who ever lived just jumped with my backpack!"
Good one. The only problem: no way would BO be on a plane with a preacher and a boy scout.