Fogonazos has a neat photo collection of semi-submersible heavy-lift ships [wiki], basically giant floating platforms that can transport oil drilling rigs, gas refineries, and even warships.
This one above is Blue Marlin [wiki], owned by the company Dockwise, carrying the oil platform Thunder Horse which was later damaged by Hurricane Dennis.
Homer comes home driving a Truck. Marge inquires, and Homer says it fell off a truck truck.
Then Bart comes up driving a large truck for trailing trucks. Marge inquires, and Bart says it fell off a truck-truck (car hauler) truck.
The scene ends with a gigantic vehicle carrying several truck-trucking trucks.
LOL!!!
I found the video here.