I have a friend that was working on his car, I think he was taping up some wiring using electrical tape. He used a razor blade to cut the tape and put the blade on the fan shroud. He started up the car to make sure everything was good. While looking under the hood the razor vibrated off the shroud and into the fan then it shot up into his NECK!!! I forget how many stitches he had to get and now has a nice scar.The doctor said that the cut was just mm's away from his jugular vein. Doc also told him he was lucky to be alive (should be a scene in a horror film)