Natural born loser
More than bad luck
The guy driving the little orange tractor made only one mistake. He didn't double check the towing hook. And this led to a series of events. The trailer ran loose. He then jumped off the tractor to catch the runaway trailer. But the farmer stumbled and the trailer crashed some motorbikes and a car. Meanwhile, the litle red tractor went on the loose and rolled back almost hitting the limping farmer, crashing the trailer, the car and even more motorbikes in the end.
I think this video will be featured on Wikipedia as an illustration for the phrases bad luck and loser.