Actually, his tails always like like. He's got a really fluffy (no pun intended) tail. When that little guy tweaks, he's usually gotta attach something like Oscars tail when it moves, or my feet when they move under the covers, in which case I propel him accross the room with the leg catapult.
Poor Oscar can be sound asleep and Simon will attach him if a wisker moves. Those two have turned out to be the best of friends.