LOL I saw it too. That's like the third time Bob's been shown lately, within the space of the last thirteen episodes, going back to "At Long Last Leave," where he was seen at the city hall meeting. Then there was "Moonshine River," and then the newest episode. I hope this means they're leading up to a really good Sideshow Bob episode very soon.
I've talked to the guy who reated the show, Angus Oblong, online, and have bought a few drawings he made for me personally. You can contact him with a request and he'll draw it for a fair price (fair compared to most "artists" out there).
Here's his website with his art gallery and other stuff: [link]