5. Boot to the head
In the late stages of a pool match in the 2003 Rugby World Cup between South Africa and Samoa at Suncorp Stadium in Brisbane, a drunk Samoan fan ran onto the pitch and attempted to tackle Springbok Louis Koen around the legs as he was kicking a goal. Koen kicked the goal, and inadvertently knocked the fan unconscious with a kick to the head, leaving him having to be taken from the field on a stretcher.