Dead track is not rubber bushed so will fold over with no resistance, or flop onto the ground is laid down.
Live track has rubber bushings, and will resist any movement other than it's natural state.
You almost have to force the live track in order to pinch fingers, although the usual pinch points of things like sprockets or track jacks still exists. The dead track will happily grab a finger with all it's un-suspended weight if you don't control it.
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