Jerry Nelson, best known as the voice and pupeteer of Sesame Street's numerically-obsessed vampire, The Count, has died:[link]
He did a great deal of work with Jim Henson and company, so, anyone who A) was a child, and/or B) ever watched TV, will most likely have seen or heard him at some point.
Due to the fact I suck at math, The Count obviously failed me on that front, but damn
did I get some good tips on maniacal laughter.
"AAAH AAAAH AAAAH AAAAH................twelve."