Comedian Katt Williams remains behind bars as of Sunday after being taken into custody for physically assaulting an Atlantic Aviation towncar driver in Portland, Oregon on Friday night. Williams was on his way to the “Wild N Out” improv comedy show at the Moda Center when he and the driver engulfed into an argument about transportation of his dog. The verbal altercation quickly turned physical after the comedian allegedly assaulted the man, TMZ reported. He then left the scene in another vehicle.