If you do the mowing trick can I give you a tip. Either attach yourself to the fence at the top or think VERY carefully about a deadmans handle setup for the mower.
I worked for a landscaping firm for a while and was mowing a steep bank which gave way underneath me and flipped the lawnmower pinning the deadman's handle so I couldn't pull the release pin. I was then sliding down the bank toward the spinning blades. Fortunately the handle pulled at the last second and the blades came to a stop on my steel toe cap, still with enough momentum to spit my boot open and turn all my toenails black.
Still occasionally have nightmares about that.
PSA If you are going to mow that with a petrol mower, you will need a 2 stroke. I had a 2 stroke one, got it from the Roger Taylor. Sold it to a welsh chap with a lawn on a hillside....tis how I learned that 4 strokes go bang on hills due to oil starvation.
