That was only one wire that I forget the purpose of, perhaps as electronic barrier. I can't imagine the mayhem of a grid of wires being struck with the same misfortune.
Some CS students even made a game based on the hilarious video, where you play as the moose and must eat apples while defending against incoming lawnmowers: https://joelspeanuts.itch.io/elgspillet
As a kid, I gave our family cat a close scalping. It was late fall and we were picking up leaves with the mower. After a lunch break, I fired up the mower and the cat shot out from underneath making an awful noise and headed for the woods.
We assumed she was fatally injured until two/three days later when she came walking back up the sidewalk, sporting a close shave on one part of her head, but otherwise seeming uninjured. She got plenty of her favorite food that day!
Basically, I put down wire guide cable into the lawn and into the cement as well. It is all powered by electricity and has a little docking station. When it is scheduled to cut it simply rolls out, goes to the lawn and starts cutting on. After a pre-determined point, it will go back to the compost bin to dump the grass cuttings before going back to cut the lawn again. After it is done with all the cuts it simply returns back to the charging station.
I am trying to add better features to it like weather detection. If rain is scheduled then it will cut the lawn early and then delay cutting it again until the lawn is dry. I am also working on adding an edger component and a weed wacker competent so it can handle those tasks as well. Pretty much, my goal is to have a fully automated robot lawn mower when I am done with this project. So far it only cuts the grass and dumps the waste. I think this wire guided method is far superior to the autonomous robot mowers because most people's yards are in static arrangements that rarely change. So it is better to just add in the wire permanently so you get a perfect cut every time.