I just finished making a 5-second animated logo for my video productions. I had the design in mind for a while, and just got around to putting it all together.
Here is the original sketch of the design, which was no bigger than maybe 3"x 2".
I scanned it, blew it up to 8.5 x 10, redrew (partly traced) and scanned it. Then I tweaked it in a vector-based program, then souped it up in photoshop and added a pavement texture beneath it. Then I created each frame in photoshop, moving the lid and turning it, and finally, I assembled it all into a short animation. There are a few minor tweaks I need to make to the final animation, and I still have to record a couple sound effects, but it's pretty much in the can.