Donkey's Revenge
Donkey's revenge is when a girl has been donkey punched and decides to get revenge. While receiving anal sex from the male, she has a friend sneak into the room and just as the male is reaching climax, her friend punches the male in the back of the head, interrupting his orgasm and hopefully making him think twice before he tries a donkey punch again.
Angry about the fact that Peter had donkey punched her the previous week, the next time they had anal sex, Charlotte had her friend Bella come into the room and smash Peter in the back of the head just as he reached orgasm. After being on the receiving end of the Donkey's Revenge, Peter decided against Donkey Punching his girlfriend in the future.