hahaha that's funny. i remember doing that a couple times when i had one. then i moved to the top.
the funniest head bonking think i saw was two years ago on the bus. this guy who rode our bus is fairly tall. about 6'2". so his head was about three inches from the top of the bus as it was. well a kids backpack was in the middle of the walk way so he went to jump over it. he literally ricashayed (i have no idea how to spell it...sorry) off the ceiling of the bus. you saw him jump up and fall down really fast. was so funny. we all died laughing.
lol...kinda took over this thread...sorry....