By Garfield's Jim Davis! Ha, no. This time-lapse shows Meredith Gran drawing her comic strip Octopus Pie, from rough sketch to line art to shading, in six minutes. But if you don't care about seeing the detail work, watch her draw another one in two minutes instead. Both are below.

Six minutes:

Two and a half minutes (and with a superior soundtrack by the Fiery Furnaces):

Commenters on Metafilter are comparing Gran's process, which uses a program called Manga Studio, to pencil-and-ink.