He explains it so clearly here, but how are you supposed to count 50 seconds so calmly in the air like that?

You can count on how many years of your life flashing before your eyes.

They had me cross my arms over my chest and hold my head back against the instructor's shoulder when we left the plane.

Also the instructor can give you hand signals.

Rukaroa said:

He explains it so clearly here, but how are you supposed to count 50 seconds so calmly in the air like that?

Skydivers have altimeters to tell them when to pull the chute