I'm sure this has been noted, but I just noticed it today, while watching a few episodes of Futurama that I've taped.
During the introduction when you see the people going through the tubes I always wondered if I had just seen Dr. Zoidberg pass by or not. So I just slow-mo'd it and yes, it was Doc Zoid....and Zap Brannigan, and Kif, and Hermes, etc. I wonder how many of the regular and recurring characters are seen in that sequence? Does anyone know?
I just thought it was cool.
Forever Man