Unlike Jack Bauer, Kiefer Sutherland doesn't throw any punches. Literally.

According to The Hollywood Reporter, Sutherland was in attendance at an NYC club this past Monday night when fashion designer Jack McCollough "rudely bumped" into actress Brooke Shields while she was speaking with Sutherland. After McCollough refused to apologize - wait for it - Sutherland headbutted him!

Normally, this wouldn't be that big a deal. Celebrity makes a boo-boo, money exchanges hands out of court, problem solved. However, fans of 24 may recall that during production of the FOX drama's seventh season, Sutherland was busted for drunk driving. He served 48 days in jail but it never interfered with production because the writer's strike halted it.