I just bought a new car and it has internet enabled remote start. The salesman touted the feature. My response: “oh so I can start the car in [one state] while I’m in [another state] so it’s ready for me when I get back?” He didn’t have a good response for that. Nice car, dumbass feature.
Do you mean that you can’t imagine how he actually drove it into the swimming pool unless alcohol or something else occurred? Because falling over a 5-10 foot ledge and having the mower land on you would easily cause significant injuries.
As for why it was driven into the pool: Could be something as simple as being distracted, eg., using his phone while mowing.