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
Moose are huge and scary. I've heard more stories about smaller animals like badgers attacking the lawnmowers. Or at least making noises at the lawnmowers whenever it approached the lawn boundary where they were hiding.