First watch the flick:
Now here is the secret: Go back to the beginning and observe the rear fender's height above the top of the tire. Fast forward to about 2:00 when Thirteen! Count 'em! Thirteen! clowns have gotten out of the car and again observe the height above the tire. Thirteen clowns at 160 pounds per clown equals 2080 pounds. The interior of the car is completely removed: seats, panels, headliner, even the panel closing off the trunk space is removed. The driver sits on a milk crate. The suspension is beefed up so the car can support one ton without bottoming. And then all those clowns cram into it.
Current record capacities: