When you are taxiing into a gate, there is a guy waiving what look like two table tennis bats (I imagine that is not their proper name) so you know when to stop. The pilots are in full control of the aircraft's movement.
But what happens on a push-back? There, the pilots have less ability to control the aircraft's movement because you are being pushed, right?
So, if you need to stop immediately to avoid a collision with an aircraft/truck that only the ground crew can see, is it the ground crew who are responsible for stopping the aircraft? Or are the flight deck crew still responsible for avoiding a prang during push-back?