My black pastel George did that a lot the first year: eating sideways, drowning himself in the water bowl while eating, then letting go and "losing" the mouse in the water. And of course, biting me when I go to retrieve it for him---Oh, hey THERE it is! Oh hey, no, that's a hand. Sorry. Uh, my lower jaw is stuck, can you help pull it off your finger maybe...?
I still don't think George has gotten all that much smarter as he's gotten older, but he has figured out eating. Mostly...