I think I found the pinball episode you mentioned, but it's not quite the same. I was at my parents house and dug through their old DVD collection for season 1/ episode 8 and sure enough in the last minute or so the camera pans over a basement and there's a machine way in the back. I zoomed in as much as I cold and took a screenshot but it's really hard to make out. Seems like a contender though:
