As though the case for octopus intelligence wasn't strong enough already, check out the moves on this eight-limbed beastie. With a few deft turns of its tentacles, it manages to unscrew the lid of its enclosure from the inside.
Pretty sure this octopus is just flexing its muscles, though. After removing the lid, he seems perfectly happy to just sit there and mock our attempts to confine him. Octopuses like to mock. And thieve.