I never realized he had a sense humor; which undoubtedly was honed during his games of "words with friends" against he Big Bang Theory's Sheldon Cooper.

Hawking made the surprise video appearance to kick off Friday's "Big Bang Theory" panel at San Diego Comic-Con. The segment was pre-recorded in his office; Hawking jokingly tells Sheldon (Jim Parsons), "Sorry I couldn't be there. I got a flat tire," he said. "That was a joke. Ha ha ha!"



I still prefer the Barenaked Ladies version though.