Motley Crue rocker Nikki Sixx was so infuriated when a bottle of urine was thrown at singer Vince Neil during a gig, he punched the fan responsible backstage after the show.

Wildman Sixx stopped the concert and asked the audience to point out the person who threw the bottle, then arranged for security to allow the fan backstage, where he dished out his own justice.

When asked by Blender when the last time he punched someone was, Sixx replied, "On the 2005 tour, somebody threw a bottle of p**s and it hit Vince in the head. And I asked the audience to find him and bring him backstage.

"He was brought back, and I told the security guys to leave us alone. I had a word or two with him. And, yeah... he apologized."