At the point when your boyfriend/girlfriend/fuck buddy pisses you off to the extent that only a knife to the throat and an hour of terrorising the pig will rectify the situation.
A: I flinched whenever you kissed me.
B: You WHAT!
A: Yeah, I never even fancied you. I just needed somewhere to coch and I wanted you to drive me everywhere and buy all my drinks and feed me.
B: Knife moment...