Establishment and development are two elements that take into account time. New development takes place against old establishment. Sometimes this development is of crucial importance, since it's also the deciding factor for all. Time flies.
The oak from garden must have felled and hit against a fenching wall making a crack in the wall. This is then followed by the fact that some part of the oak is touching the ground (earth) while rest other is still in air (not touching the ground, suspended, touching the wall). Absolutely interesting.