At the Time of the initial Movement when the stone falls from the window its potential trajectory is one perpendicular Space that is no longer the same as the stone continues to move until it hits the ground.

FORBES: Colliding Galaxies Provide A Glimpse Into Our Future

You check my numbers and discover a mistake: my trajectory will instead send the astronaut hurtling into outer space.

CNN: Both parties abandon the jobless

This time, the timing can't slip even by a few seconds, because then the SpaceX vehicle would end up in a less than optimum trajectory and lack essential fuel reserves to be able to catch up and dock with the space station.

WSJ: SpaceX's Pioneering Flight Plans