The entire Soviet Union being revived montage (though that actually had at least a flimsy bearing on the story), but none more ridiculous than Lenin breaking from his glass coffin and attacking tourists while moaning, "Must...crush...capitalism..." Even the writers on the DVD said that this was the most insane sequence they ever did.
"Funny Aneurysm" Moment: The scene in the United Nations where Russia identifies itself as the Soviet Union and, when questioned about it by the U.S. ("The Soviet Union? I thought you guys broke up."), the Russian diplomat replies, "That's what we wanted you to think!" and old school Soviet Union comes out of hiding, is a lot less funny considering how many scholars are saying we're in a new Cold War with Russia.