Olympic pushmowing on uneven terrain with lots of rocks and roots where it's not regular grass but super wet stuff that never dries, viney things that bind up the mower, and weird plants I can't identify (or maybe some kind of lichen sort of thing?). I definitely spend enough time practicing it. Can't wait to shade a lot out with the orchard I'm planting and replace others with better (largely edible) plants and better ground cover.