An Apache gunship pilot should learn to do that. Blow up a little Afghani village and then do crazy spinning somersaults over it. Imagine how freaked out they'd be.
Naw, the little kid being crushed by his roof would look up in the sky and see the barrel roll finish and let out with his dying breath "yessssssssssss.... it was worth it...."
Mouser, I don't see a problem with that. Just imagine a helicopter that comes flying in end over end and rips itself in half. You know your enemy just blew up a helicopter and killed their own guys just because it looked awesome, you don't wannt fight that.