When a girl goes for a night out with her friends and wakes up the next morning in a strange bed, feeling used and ashamed. On some occasions, she will wake to find she has been branded on her rear.
A build up of anger over absolutely nothing. This anger at peak will turn the entire head the deepest beetroot red known to mankind and look like it is possibly emitting more heat than a supernova. Is often accompanied by the steady muttering "aha mmhu, aha mmhu" warning those nearby of the pending cataclysmic events to come.
The moment he saw that he was going to be asked you do something he just went off on a mad petchy.