What is the Strangest USB Device?

http://www.lockergnome.com/hardware/2011/09/21/five-interesting-usb-hubs/

Andrei_Iurea, a member of the LockerGnome community asked: "What is the strangest USB device you've ever heard of?"

Do you own any strange USB devices? Perhaps you have a hub that has an interesting look to it, or a flash drive that resembles an animal? You may even have one of those missile turrets that is powered by USB. In any case, these low-powered devices have a way of cheering users up during a long day at work.

So, what is the most interesting USB device you've ever heard of?
http://lockergnome.net/questions/152847/what-is-the-strangest-usb-device-that-you-heard-of

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