A question was brought up in another thread in the Balintawak section about prison arts. I know that there was a 'modern' art called Jailhouse Rock that was popular to discuss for a while. Usually in association with the Lethal Weapon movies. It basically consisted of how to effectively fight while having your hands and/or feet shackled. Similarly the art of Caporiea was a slave art that developed because they hands were shackled. Does anyone know of any other 'prison' arts that have become 'systemized' or at least been given a particular name. Surviving Edged Weapons by Palladin Press has footage of inmates teaching inmates knife/shank/shiv applications, there is a story in Doce Pares of a euro fencer and a Saveedra cross training in prison, and there is the Jailhouse Rock system as a modern example. Even, to a degree, you could stretch the Gladiatorial fighting styles as 'prison' arts because they were not training to fight in 'combat' like military operations or skirmishes but were training as slaves to fight for entertainment (bloody and gruesome at times, but entertainment none the less).