I dunno about world's fastest, but that is pretty fast. Courtesy of Mike Lynch:

[Falanga] did work behind the camera, for the animation departments at MGM and UPA, and did live action film and TV work (both behind and in front of the camera) in the US, Italy and Spain.

Here he is on the American game show To Tell the Truth. The celebrity panel is composed of Kitty Carlisle, Durwood Kirby, Gene Rayburn and Peggy _____ (I forget her last name- she was on a zillion game shows in the 60s and 70s). While the celebrities are guessing who is the real cartoonist, the contestants are drawing caricatures of them.