All I remember is a black and white animation of a man (or something that resembled an abstract man) type thing that turns on an overhead light and realizes he is trapped in a box. He begins to run, faster and faster and makes no progress. Then I think he just walks out. I remember it being very 2-D and not much detail was involved. It didn't advertise anything that I can remember and was only maybe 20 seconds long. It would have aired somewhere in the 1990-1995 range? I could be WAY off on that though. I just want to make sure I didn't dream this up on my own! haha