It's almost every Super Smash Brothers Brawl character doing the Caramelldansen dance as their taunt! Sure beats the animated versions (here and here.) And the best part? As long as you have an SD card, you can easily mod the taunts into the game for your own use.
Brawl modding is pretty easy and the results can be pretty cool. (hmm... i maybe should have chosen another example.) Just follow this guide and, if you can read directions, you'll be set up in half an hour. Once you're set up though... If you just want the Carmelldansen taunts, that'll just be copying one directory to your flash card and you're done. But see if you can stop at just that one mod... you can easily spend days sorting through assets and configuring your Brawl hacks.