As others have said - a positive 'cut' of the throttle at the correct moment/angle would normally operate the back release due to the weight of the cable and this technique also prevented releasing under tension and ending up with a 'birds nest' on the winch drum.
I have seen a couple of winch drivers over the years keeping power on until the cable was vertical and then relying on the wind to clear the cable away from the cab
I have also seen one guy do it to the extreme and ended up with the cable wrapped aroung the cab
- that was exciting to watch
he was lucky not to get hurt by the flying splinters and flailing cable etc !
Of course a throttle cut would not help if the cable was attached to the wrong hook !