A man in Canada was scratching what he thought was a pesky itch on the back of his neck.
It turned out to be the blade of a knife he was stabbed with three years ago.
The man said he was stabbed five-times at a party, when he got into a fight over an arm-wrestling contest.
He says doctors just bandaged him up, and never took an X-ray.
But, the wound never stopped nagging him.
He said he always knew something was wrong because he set off most metal detectors.