Tom Cruise is a very bad actor. I can't stand him and don't watch his movies, so I forget how really awful he is. But today I saw him for a minute or so in A Few Good Men where he does his trademark scientologist thing---he throws a tantrum and starts yelling "funny" things.
And according to the comments on the YouTube clip, the rubes think this is fine acting.
He does this crap in all his other movies. Did he do it in his blowing-up-Hitler movie, too?