well he cant flip himself over and as far as clumsy goes he has never ever fallen as long as he has been in my tank,i have never seen them do it but he is always about 4in away from the glass and 1in from the clowns bed and always always on his back, also he cleans the front better than the back so i dont know maybe he didnt get the memo or the clowns got tired of him coming back for more and scrambled his brain