During gym class, we were doing a workout video. This is what happened:
Two girls start screaming at someone to keep their back straight. The thing is that they are not even keeping their backs straight.
It's really frustrating how they assume that they're doing all the exercises properly and that they can give criticism to other people.
Also, they screamed it out loud exactly when the teacher was coming around.
Is there a word to explain this type of behavior?