Fozzie's heroic struggle to get to the bank in time. Sure, he fails at the very last second, but given that the entire universe seems determined to stop him, the fact that he even made it to the bank is damn impressive.
In probably the most heroic moment of any Muppet film, Fozzie runs through a hallway full of Frickin' Laser Beamsthree times. If that's not Muppet heroism, nothing is.
Doubles as a Funny Moment when we see Miss Bitterman's "Oh, that's gotta hurt" reaction each time when Fozzie does so.