as a regular thought process my mind scans items of interest when working in the bush. After a bout of logging by one of the landholders I was in there utilising abandoned resources. (When it comes to trees I have a philosophy along the “One Tree Project” – ie use everything). This tallow branch is about 200mm thick. I can break across my knee a branch of the same species, at similar greenness, up to about 15mm. I could jump on a branch to break it up to about 28mm, Probably be able to snap a branch up to about say 40mm using any other means other than engine power or hydraulic force. So I begin to fathom the forces in play when a huge eucalypt is cut down The acceleration due to gravity at the point of impact must deliver a force through the mass of extraordinary magnitude.. My mind boggles.