One of my favorite bits that Jonathan Coulton does live is “Mr. Fancy Pants,” which he accompanies himself on using a Zendrum, a percussion instrument hooked to a laptop that uses samples and such and…well, you’ll see in the video. But here it’s not just Coulton and his mad science gizmo…he’s also joined by beatboxer Kid Beyond, and they have a bit of a duel. Very nicely done.
Found via Mr. Fancy Coulton himself.