it IS from exit 57. I have every episode; only 2 six-episode seasons were made (12 episodes in all). there's also a bunch of unaired sketches made for a third season that got cancelled prematurlely. I have those too. I also have the unaired pilot.
My favorite part of that sketch is this:
Kid: Hey, maybe you know... what does this mean? (flips off the other kid).
Other Kid: I don't know... but I like it.
Exit 57 was pretty great. Sometimes it could be more hit-and-miss, but there were some hysterical things on there. There are few jokes on it that you see they reused on Strangers With Candy, and you can see a few characters that are very Jerri-Blankesque. There's also a sketch that very closely resembles the characters from the Hospital that Jerri works at in the Strangers With Candy pilot.
I first saw the show when a guy I trade MST3K episodes with accidentaly sent me an episode at the end of one of the MST3K tapes. I asked if he had more and he had 4 other episodes. I traded those episodes with SWC fans all over the internet, and now tons of VCDs and shit are being made from those episodes. This regenerated tons of interest in the show, and somebody uncovered all the episodes and promos and unaired sketches and put them on DVD. That's what I have now. Maybe with the new interest in the show, Comedy Central will show them on TV again or they'll release them on DVD. Yeah right
