Science blogger Mike Lisieski found this video of an octopus who's turned trash into treasure. It's a tight squeeze to get out of the bottle, but the ability to maneuver through tiny spaces is one of those skills octopuses evolved both to defend themselves against predators, and catch their own prey. Basically, an octopus can go anywhere that it can fit its hard beak through—the rest of its body is squishy and malleable. In fact, in aquariums, octopuses are often given mazes with narrow passageways and hidden food "prizes." The games help keep the octopus' awesome brain entertained in captivity.
Bonus: There's a great color-change moment right as the octopus pops out of the bottleneck.