In the proud tradition of Badger Badger Badger and Peanut Butter Jelly Time, I give you: LeekSpin. (Hat tip: Ethan at SLC Spin.) Warning: this will be stuck in your head for weeks and yet you won't be able to look away.
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I clicked that intentionally because I knew what it was and I love that thing.
If you right-click and get the flash controls, you can click Rewind and make it sing over itself in a creepy way.
She looks less like she is spinning it and more like waving it back and forth. I wish it was leekflippingbackandforth.com.