When two bodies meet on a specific time-space location, subatomic particles are the ones that collide not the objects themselves. The meeting could be deafening, watery, elastic or rugous, but the one single characteristic that remains constant no matter the fierce of the collision or the nature of the objects themselves, is the deformation of the environment where the collision takes place. Contrary to the natural logic the deformation is not an expansion of the space-time shape of the environment but a shrinking. This deformation last no more than 0.13456 nanoseconds and it has been proved by several experiments that the amount of energy the collision releases is linearly proportional to the amount of contraction of the environment.
So, if the meeting of two bodies no matter how, no matter when, no matter which, ends up with a deformation of the environment which host the collision, in order to achieve a better understanding about the deformation process of the environment and according to recent speculations about the possibility of extract particles from past space time locations, the actual hypothesis is stated as a question:
will the reversal of the space time of the collision expand the environment and if that is true: would that expansion be stable and for how long?