This guy is one lucky dude.
I can just picture the scene in the hospital:
“Are you the brain specialist? My brain hurts!”
I can just picture the scene in the hospital:
“Are you the brain specialist? My brain hurts!”


I just have to wonder why in the name of all that's holy, did he even decide to shoot a nail into his head??
<- this or
<- this
The nail gun recoiled after its last shot and hit him in the head, which the sensor recognized as a flat surface and triggered the next nail to fire. He just thought he had been whacked in the head by the gun, and didn't even realize a nail had fired until he saw the x-ray.