Sean Freeman

I think he's talking about corner cutting, if you do it on smaller diameter trees the reduced hinge will fail earlier and the effect is often to pop the falling stem up and off the standing stem.

You need to use a fair bit of discretion with corner cutting its really a technique from commercial forestry designed to avoid root pulling damaging merchantable timber....reducing hinge width can have undesirable outcomes.

__________________
Sean

Trees are poems that earth writes upon the sky,
We fell them down and turn them into paper,
That we may record our emptiness.
- Kahlil Gibran