When Pete is levitating, he mimics the actions of Charlie and his Grandfather after they drank the soda. When he lands and Rose asks how he feels, he says, "A little gassy", which is how Charlie and his grandfather felt afterwards.
Three men are asleep in their Las Vegas hotel room, they've lost their companion from the previous night having visited a strip club and are told to empty their pockets for evidence to help establish their whereabouts on the previous night.