If you really piss someone off here in the US especially in a bigger city you are likely to get shot in the face seriously
not kidding. You know about our gun laws. I understand though, here sometimes it seems like idiots try to cut you off just because you have a nicer car than they do and they're pissed.
Actually about three months ago some guy in a minivan cut off some dude and almost ran him off the road (This happend about 5 blocks from my house I live about 50 ft from a highway) So anyway the guy that was run off the road followed the other guy off of the highway, caught up with him and shot him in the face. This is common here.