unwelcomed and you usually see security promptly remove them...that's a different scenario than when artists invite people on stage with them.

i'm not saying he was justified in sucker punching anyone. i don't know what was going through his mind or what he thought the person was going to do....if she'd have turned around and stabbed him or something then people would be like, 'damn, where was security'. that's why you have security so people don't get on stage and things like this don't happen.