Sweets sends along this obvious one for today: a week ago this gent hit what he thought was the back of his face with a nailgun. But he didn't realize what happened...
Six days later he went to the dentists' office for what he thought was a toothache. This is what they saw on the X-ray - a four-inch nail, entered through his lips, lodged behind his eye, and just short of his brain. He went into surgery to remove it, which was successful. Four milliseconds to put the nail in, four hours to take it out.
He plans to go back to his construction job but will use a simple hammer from now on.
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