Flying without a parachute

A man jumps out of an airplane with a parachute on his back. As he’s falling,
he realizes his chute is broken. He doesn’t know anything about parachutes, but
as the earth rapidly approaches, he realizes his options are limited; he takes
off the parachute and tries to fix it himself on the way down. The wind is
ripping past his face, he’s dropping like a rock, and at 5000 feet, another man
goes shooting up past him. In desperation, the man with the chute looks up and
yells, “Hey do you know anything about parachutes?!”

The guy flying up looks down and yells, “No, do you know anything about gas