Amy and Ruthless have been territorial since day one of working together at American Electric tattoo studio. On 'LA Ink' (Wed., 10PM ET on TLC), the two finally hash it out when Amy brings up various grievances still bothering her.

Ruthless responds, "I think you're just overreacting on everything. Everything's such a huge deal to you ... Am I gonna expect for you to trip out every single time I don't say hi? ... Are you serious, like, how old are you?"

"I feel like this is a pissin' contest that I don't want to be no part of," says Amy. When Ruthless has finally had enough, she says, "I don't wanta see your face. I don't want to hear your voice. And if I do, I'm gonna knock your teeth out and put your face to the curb."

So ... that didn't go over well.