Farnsworth: For this highly controversial mission you'll be towing the Juan Valdez, an orbiting supertanker full of rich Columbian dark matter.
Leela: Dark matter oil? What if we hit something? The tanker could leak.
Farnsworth: Impossible! The tanker has 6,000 hulls. So, unlike me, it's entirely leak-proof. Now, once you've hauled the tanker past the protestors-
Farnsworth: Correct. 6,000 hulls.
Leela: Why do we have to fly within three feet of this penguin preserve on Pluto?
Farnsworth: To avoid the tollbooth.