Thats nothing. Fukkin wuss.
During a thunderstorm I was closing a hatch on an ACV (armored Command Vehicle), and the wind caught it and smashed it into my head. Thats 3 inches of REINFORCED ARMORED STEEL that hit me in the head. Also, the platform i was standing on was wet, so once it hit me and my entire body relaxed from the impact, I slid off of the platform and smashed my head on a wooden counter (breaking part of it), before hitting the floor of the vehicle (1/4in steel plates).
The major who saw it thought I was dead instantly when he head it and saw my body go limp.
I was unconcious for awhile, but in the end, I was UNHARMED. NO concussion, no fracture, no bleeding or anything.
BTW, before you ask: Yes, it was my bare head, and yes it was stupid to be doing that in a storm without a helmit.
I actually got a "counseling statement" about how I could have had a severe concussion, skull fractures, and other broken bones.
SIDE NOTE:
Now, while there was no "physical" damage at the time, I did have to submit to neurological testing and it was determined that the impact caused my brain to stop producing some chemical (or at least thats what I understand). Anyway, I have to take pills to stimulate/replace the production (or something to that effect).