As a child going to the circus, you might expect the clown to throw a bucket of confetti at you, or squirt you with water from the flower on his lapel.
You certainly wouldn't be prepared for him to grab you by the scruff of the neck, punch and kick you and leave you needing hospital treatment for cuts and bruises.
As these astonishing pictures show, that's what happened when 12-year-old Amos Lutz met Kaspar the Clown at a circus in Leipzig, Germany.
