We were at a costume party earlier so we were in costume. My buddy goes to some guy walking out, "Hey when you see a kid in blue face-paint, call him a fag." The dude says "Ahhh..um...nah" so then my buddy goes "fag" and the guy gets this angry look on his face - doesn't say anything just walks away and we go in.
That was it.
make your buddy pay for it. it was his fault.