"Shut up and get us a bus!"
Surprised being rude as fuck to a teacher is not a trigger. Also, "coercing another student", then again, that was likely to lead to a mass suicide at some point (like this one) and not what the guy was aiming for.
1- Violence against other people.
2- Telling someone else about the hypnosis.
3- Pee yourself.
4- Touch erect genitals with your hands.
5- pick your nose.
6- kick a ball with your right leg.
7- sit in the school corridor.
8- drink coffe.
9- yawn in front of a teacher.
10- burst out laughing.
11- Stumble and fall.
12- Lose in rock paper scissors.
13- Throw something other than garbage in the bin.
14- Leave school.