Combine demolition derby

Competitors typically remove heavy or unneeded parts of the combines before competitions and reinforce the front, or header, of the vehicle.

[3] A vehicle is deemed eliminated once its header section is destroyed or the combine is immobilized.

[4] The competitions can end in ties if the only remaining machines become inextricably tangled together.

[5] Some competitions enforce rules about the height of the header, tire standards, age of the contestants, and the location and contents of the gas tank.

[5] Though some competitions offer prizes of $1,500, it is expensive to modify and maintain the combines and some winners lose money overall.