Daigooro is an alligator that stands upright when doused with water. He lives at Marine Plaza Miyajima in Hiroshima Prefecture, Japan. From Mainichi Daily News:
The 80-centimeter-long male alligator was first spotted standing up about two years ago, when water that a keeper poured on plants in his cage splashed on him… From this year, Daigoro, a three-year-old dwarf caiman alligator from South America, has been entertaining visitors by performing the stand-up show every noon when a keeper pours water on it.
Link (Thanks, Paul Saffo!)