A bizarre game took a scary turn at a high school in Tilbury, Ont., east of Windsor.
Chatham-Kent police say a 16-year-old boy offered to let classmates slap him for money.
Upon being slapped by the second participant, the teen lost consciousness, fell to the ground and hit his head.
He spent several days in a London hospital with a concussion.
Police say an 18-year-old student was arrested and charged with assault causing bodily harm.