This guy actually punching somebody is so out of character.
Now I am not making excuses for any asshole fan throwing stuff on stage, but Kudi should have alerted security and had the piss head removed.
Why risk your career? Obviously Gaga’s people did not like the PR nightmare and decided to give him the boot. Here is the video and the TMZ breakdown:
via TMZ
Kid Cudi — the guy who sings that “Day ‘N Nite” song — has been officially dropped from the Lady Gaga tour in the wake of a brutal fan-punching incident.
Sources at Interscope Records confirm the rapper is “no longer” with the tour — but wouldn’t say if the decision had anything to do with YouTube footage showing Cudi punching fans in the front row of a concert in Vancouver this past weekend.
We’re told Jason Derulo — the guy who sings “Whatcha Say” — will move up from his spot as Gaga’s opening act to fill Cudi’s spot … no word on who will fill-in Derulo’s.
No comment from Lady Gaga’s camp.
The story was first reported by The Ralphie Radio Show.
STREET KNOWLEDGE 
I think his music is cool but honestly he didn’t fit in the tour. I was at the last show in SF and dude just killed the mood. I thought openers are suppose to hype up the crowd for the headliners? When he got on stage everyone was on there phones texting and shit.