1. Characters will act like assholes (or more so in the case of Wildfire) for no particular reason .
2. At some point it is revealed that the characters are under some kind of mind control.
2(b). The characters are not under mind control but are pretending to be jerks in order to help out someone. This usually involves the ‘victim’ flying off and not being present for some upcoming dangerous situation.
2(c). The characters are not under mind control but are being lied to by a 3rd party. The characters will not check to see if the information provided is correct or not, they will just act on it.
2(d). In older Legion stories the characters acting strangely might have been replaced by robots OR by someone in disguise.
3. In reality, the characters are not really under mind control, they are just using the opportunity to act the way they really want to act.
Cliché #1: The Legionnaires will turn on each other at the first sign of bad behavior without giving that individual the benefit of the doubt.