In harry Potter 7 Jon slammed the Hogwarts carriage door open so hard he smashed the handle clean off.
Jon once had the pleasure directing Robert Hardy as 'Winston Churchill' at Churchill's birthplace - Blenheim Palace.
Before becoming an actor Jon worked for Bae. systems, building bits of the Hairier Jump Jet, the 146 passenger jet and the Hawk (the plane the Red arrows fly).
Jon learned to ride a unicycle in Hull when he was aged 12. He stills owns a 6ft one wheeler.
During the filming of Tax City, Jon had to fight former 2 times world champion Boxer Steve Collins.