Tyson later stated that his actions were retaliation for Holyfield repeatedly headbutting him without penalty. The referee warned Agbeko about headbutting in the twelfth round but never deducted any points. He won via pinfall after placing brass knuckles in his mask and headbutting Pearce. Lorenzo was repeatedly warned for low-blows and headbutting throughout the bout. The incident was not caught on television cameras and McGregor denied headbutting De Bruno. In 2011, Albattikhi was convicted of assault after headbutting an 18-year-old woman. In round 3, he was deducted a point for intentionally headbutting Stevenson. I've done a fair amount of headbutting. The real headbutting was kept in the episode. This leads to Kat headbutting Roxy in the face. This crest may have been used in headbutting contests between males during the breeding season. Headbutting is not allowed in ice hockey. For the 1994 on-the-field headbutting, he received and served a three-month jail term for assault. In the National Hockey League even an unsuccessful attempt at headbutting warrants a double minor.