I was going to make a morbid joke about the driver having already fallen off and into the blades before you took the photo, but the fact that there's no seat on that mower defeated that plan.
I was there with a group of parents and kids for a teen meetup. We did think he fell off at first. Then it turned by itself and we were all like "wtf?"
In this particular instance, I am sort of indifferent about it, because I don't think sitting on a riding mower is an especially taxing job and the guy still had to be there to put it in the right place and make sure nothing went wrong.