Killer clowns
A primary school urban myth, said clowns would hang around outside your school in a Transit van, depending on which school you attended it was either blue or white. Once a killer clown would catch a child they'd slit the unfortunate victim's mouth at each side, then tickle them until they laughed, causing the cut to tear their mouth into a grotesque smile.

Bearing the ultimate hallmark of an urban myth, everyone knew of this happening at another school.
written by Ki*di* Kyd, approved by Mansh