That's not the banana sketch that muppet maniac is referring to.
He's referring to the banana sketch Scooter and Fozzie did...which I'll explain here: Fozzie is dressed as a telephone. Scooter says, "Are you the telephone pole?" Fozzie responds saying he's Mike Oznowicski. The joke is that Fozzie says a name with "ski" on the end of it, which often implies that a last name is Polish, meaning that Fozzie is the telephone Pole. Hope that made sense.