Tyson made memorable appearances alongside Ed Helms, Bradley Cooper and Zach Galifianakis in director Todd Phillips's first two Hangover films, but told TMZ he won't be back for part three."I have no idea what's going on, I'm not in this one," Tyson responded.His appearances singing 'In the Air Tonight' in The Hangover and 'One Night in Bangkok' in The Hangover 2 have been credited with reviving his career.He has since made appearances in WWE and even starred in his own one-man show Mike Tyson: Undisputed Truth.The movie opens on May 23, 2013 in the US and the UK. Digital Spy