There I was, sat on his bedroom floor, leaning on my arm, having a pleasant chat, when he decided to walk across the room (not even run) and walked straight into my arm, catching my forearm with his knee.
I hurt like hell and still does if I move either it or my fingers or if anyone touches it, although no swelling. Am typing this onehanded. It can't really be seriously damaged can it? - have no idea how I'd get to casualty, gave up getting to work after 1.5 miles took an hour.