The dude fell on his butt and had a small bruise. I had a pretty good concussion, left and right eyes had split vision for half an hour. Imagine without the lid! I had a Leatt on also. Gave me such a hard hit from the force of the helmet transfering through the Leatt into my chest and back that I was winded for 5 min. huahhhhhhhhhhhhh! but my neck wasn't even sore.