IIRC, he was a top 16 snooker player a few years back, maybe top 12. One of the few, if not the only, highly-ranked snooker players to use an open break during professional competition

I believe he is currently serving out a multi-year ban from professional snooker due to allegations of throwing a match in a tournament, which is a shame because he is a very entertaining player to watch. Highly talented, but highly unpredictable, at times Hann seemed to be about as likely to get into a fistfight as to post a century in a particular frame. He was the definitely the undisputed "bad boy" of professional snooker for a while.............
Aaron