Death.
Get a bigger tree and those things have killed loggers.
The stem can be cut and just sit there. A minute or a day day a vibration sparks movement beck to where the remaining roots remember.
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Doug Dent was sent to investigate the disappearance of a faller. Pick-up was there, saw and gas were here, where did the logger go? Dent noticed that several of the trees were cut straight and no face or back-cuts.
They dug one out and found the logger. He had cut off the log, crawled into the hole to take a crap, got his pants down and was crushed to death. You'd thunk Greenpeace had gotten even.
A Faller in North Carolina was doing some easy work with his yound daughter present. She crawled in a hole and was crushed. The logger commited suicide the next day.
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Usually they return to vertical as they are cut. But be careful and never leave one not dealt with overnight.