The First Jump

Jack was telling John about his parachuting experience.

"I had all the lessons, and on my first jump the instructor
opened the door and told me to jump, but I told him
I wanted everyone to go first. After everyone jumped
the instructor told me to go, but I told him I couldn't.
The instructor tried to motivate me by saying, 'C'mon,
I have trained you, you can do it!', but I said, 'No,
No, I can't do it, I can't'. The instructor got really
angry and said, 'YOU CAN DO IT, JUMP NOW OR I AM GOING
TO GIVE IT TO YOU UP THE ASS!!!'" 

John said, "So did you jump?" 

Jack replied, "Only at first".