OK, now I am terrified of the Mantis Shrimp.
Edit: OK...not real. But those things are fierce little buggers just the same. At least they're not smarter than me, I think.
"One day while shooting, we went to lunch and walked past a shop that had a Rubik's cube keychain in the window. It was the same size as the cubes we were using with the stomatopods. I bought it and in between filming, we gave it to one of the O. scyllarus. It would retrieve it like it would a feeding cube, turn it around and strike. We got the idea of shooting a sequence with the animal "solving" the cube. We kept presenting the cube in various states of solution to the animal and eventually a solved cube. Just as they would a snail shell, when the animal determines that there is no more food to be had, they through out the remains. It was then easy to cut together a sequence of the cube being "solved" along with some head scratching (eye cleansing), etc. When Attenborough saw it, he decided to use it as a promo piece."
http://www.reefcentral.com/forums/showthread.php?t=893201