What happens next?

The men switch again and the first man is on the slackline. The man fall off the slackline onto his butt. The second man bounces and flips off. the first man

Possible answers:
[I] shifts and bends over.
[II] bounces and flips off.
[III] returns to his seats and removes his belt.
[IV] passes the slackline to green and claps his hands together.
[II]