Moved into our new (first) house, new build, ' garden' was a compacted slab of clay soil. Hired a rotavator and set about breaking up the soil.
DM was round, mostly for moral support and tea-making as the rotavator was big and bloody heavy and could only be used by one person.
It had an engine, and basically moved as long as part of the handle was held down. To stop it, you let go of the handle and it cut the engine (like a lawnmower). Because it was so heavy and virtually impossible to turn, I was going forwards then backwards in strips up and down the garden.
Anyway. I'm going great guns, done half the soil, DM goes in to make tea. I start on a 'going backwards' strip. As I near the top of the garden, walking backwards, I stumble over a lump of soil and fall against the back fence. Rotavator keeps coming. I end up flattened against the fence with the rotavator trying to run me over, panicking that the fence is going to collapse under the weight of us both.
I then remember that if I let go of the handle, the engine will cut out. So I let go. But the rotavator stops dead where it is - with me squashed between it and the fence, on my tiptoes, in quite a lot of pain and unable to get out.
At this point, I see DM in the lounge looking out of the window and start frantically signaling to her and quietly half-shouting, 'Help!' (not too loudly as I don't want the neighbours to know I've got myself stuck).
She thinks I'm waving, merrily waves back, and wanders off to finish making the tea.
When she came out and realised what was going on, it took quite an effort (and a fair bit of time) to release me. At which point we both cried with laughter (common theme in our family - when things go wrong, we laugh).
Haven't ever used a rotavator again.