I saw the gif a week ago at Moero Amazon, as a thumbnail, and thought that it was done locally there, but now Orion posts a full-size version. Strange. Anyway, there's lot more fun screencaps at Epic Win, even if the swallowing of chalk is missing. Good times.

UPDATE: Orion writes in e-mail that most likely the animated gifs were made independedly. The moe.ro one was posted earlier, but it's a thumbnail.