Each cartoon is a 640x480 pixel, greyscale GIF.
Career pigeons
Despite his unique identity, the invisble office worker was still required to wear his ID.
"Guess who?"
Solid, Liquid, and Gaseous Paper
"Obviously we can expect a significant wind chill factor."
"And you're invited, too!"
"Who wants to go for a ..."
"Look, Bruno - a little door, just for you!"