Imagine the cadaver was just some person who walked on a treadmill of a windmill when the wind wasn't blowing. The person died on the treadmill, and since this

Imagine the cadaver was just some person who walked on a treadmill of a windmill when the wind wasn't blowing. The person died on the treadmill, and since this was out in the middle of nowhere, the whole scene was left untouched. The corpse gets wedged into the gearing and the machine stops until the body rots enough that what's left falls free and the gears start moving again when the wind blows.