Yeap...that has got to be one of the all time "you're not gonna' believe this" stories...right up there with the guy with the telephone pole through his abdomen!!!!!!!!!!!!!!!!!!!
I couldn't find the link. But I read one a few weeks back about some guy working on his roof and falling off or something to that nature and had a nail gun drive 9 nails into his head. He lived, somehow.
A few days ago CNNs site had a link to a local paper somewhere of a little girl who was running with a screw driver and fell. They had a picture of the CT scan and showed the tool going inside the eye and into the skull. She was absolutely fine, despite how gruesome the picture looked.