We thought the rider fell off or something and it was going to crash. Then it turned and kept mowing. Park Roomba!
Another picture:
We thought the rider fell off or something and it was going to crash. Then it turned and kept mowing. Park Roomba!
Another picture:
What things the size and shape of a tennis ball are you concerned about it running over?
If you’re worried about it running over a person, use something that looks like a person as your analogue.