No ones ever proved that. Plus the person who uploaded it is a known Unic. Second ones worse anyways, dude stands up after nailing a wooden board to his junk, doesn't look like special effects in that one.
How your arm fall off in a car crash and both dudes fly out the side windows
jk. when I was in the army there was an accident close to the base and I was one of the people sent there to help out. it was a 3 car a semi truck driver had a heart attack and smoked the driver side door of a honda civic that was then pushed into a Ford F150. the driver in the honda had his right arm missing from sharp metal sheering it off.