So I've been looking for a thread like this since I beat the game, and there doesn't appear to be one. This thread isn't for collecting everything in the game and extended play or whatever, it's for those "easter eggs." I've so far only seen/come up with 2:
...pour Total Load into Strong Mad's locker before framing Pom Pom?
...climb into the vent while the KOT is still stuck in the hole?
I'd love it if others found some neat new things and would post them here.