Ahhh, the old mirror slap to the back of the head trick. I used to not wear a helmet until a friend, who had got slapped on the back of the head by a truck mirror, had me sit on my bike next to a truck mirror. Yep, the perfect location for a slap to the back of the head.
Heal up soon and whenever you get together with cyclists and compare wounds, like in the movie "Jaws", remember you'll probably win now. Although, I think Axxon is the Quint of the group with the smashed front teeth and all.