The Crusty Demons are a group of daredevil freestyle motorcyclists from the United States, Australia, New Zealand, and Europe. They originated in 1994 with the filming of Crusty Demons of Dirt by Fleshwound Films. Since then, they have been the subject of about 20 videos, and in 2007, the video game Crusty Demons was released to the public. Together the members of Crusty Demons have set 11 world records in their careers.

Robert William 'Robbie' Maddison is an Australian motorbike stunt performer. Nicknamed 'Maddo', he is from the town of Kiama, New South Wales.