That's actually a bloody neat idea - not that I have a surplus of earthmoving tyres loafing. Last one I dropped was a half rotten shelter belt tree, knew it was dodgy and took steps including tying it off so it could only fall one way and moving well out of the way real quick when it started moving etc etc. It did everything it was supposed to, apart from the dodgy rotten secondary trunk that I couldn't cut off it and which decided not to fall over with the rest of the tree it was attached to. Once the main started moving the secondary tried to stay upright hanging onto mid air as the rest of the trunk below and beside it moved away. The secondary eventually caught up with gravity and dropped, then pivoted and leaned against the mesh and wire fence right next to it popping the staples, once the staples popped it somehow hopped over the fence and lay down beside it without busting anything. I should have video'd it, it looked like a cartoon tree falling over and leaving the branches behind. Still don't know how it did what it did.
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