So I work in a bike shop, I was putting a boxed up bike up in the rafters for storage when the box knocked a wheel from the ceiling where it was hanging right onto my head. Hurt like mad, and I thought I was gonna have a big bump there... but when I removed my hand from my head it was covered in blood. So I got to go to the hospital and get stitches. I now have 5-6 stitches holding together a 2 inch gash on my scalp all from a rhyno lite wheel. Real cool, Doc said I couldn't ride for a while due to the whole helmet and head sweat issues, so I'm really stoked about that. Now my head doesn't really hurt, I just feel like an idiot who doesn't get to ride for a while.