What you do is...follow him to a bar or club.etc. when he goes to take a piss follow him into the bathroom and beat the living shit out of the guy.....it works cause guys don't go to the bathroom in groups like chicks do.....slam his head in the toilet, break a mirror with his face and when he's all beaten and bloodied on the floor...spread his legs and kick him in the balls as hard as you can......then walk out of the bathroom, casually, and get the fucj out of there