Replying to Hypnotist at Grad Night

I watched and my friend tried to get hypnotized but it didn't work on him.

After watching the show and watching all these people do stupid shit I still have my doubts on it. There were some people obviously faking it but some people really slammed the ground hard falling out of their chairs. The people doing the stupid shit were the people who love attention at school so I had a hard time believing it wasn't just an act. Half the people got up through the show because they didn't feel hypnotized.

What do you believe?