LOL that was sick, but I really don't think its fake. The girl looked very worried and when she went, she even broke down and started to cry right after which made it seem even more real.
She probably had IBS or something, if you have something like that and you have to go to the bathroom but have to wait 30 more seconds, your in trouble. And she probably had to go an hour before that but couldn't find the time because of the shoot.
Anyways that was sick stuff. The guy was funny though.