My dad had an attempted mugging happen to him once. I say attempted cause he beat the shit out of the guy and left him in the street.
My dad used to be a bouncer also. Hes no huge guy... but he knows how to fight. The guy had a pocket knife too supposedly. I wasnt there, but I dont know. I just know from my mom that he also came how with blood on him, and he wasnt cut anywhere.
Either that or he killed someone and lied to my mom...