David Lee Roth does not like his Pretty Woman interrupted!! During a Van Halen concert in New Hampshire last night, a fight broke out during Pretty Woman.

David Lee Roth don't play that though ..... check out what happened in the video below!

There are a FEW F-bombs in this so heads up!  It's probably NSFW!!

Now you know.  If you want to fight at a concert; I guess you'll have to stick to the tejano shows!! :)