The second use is any time a ball hits the flipper with enough pressure to beat the holding current. This may trigger the flipper to collapse, but the end-of-stroke switch opens when the flipper starts to fall which tells the controller it needs to re-energise the solenoid with total electricity https://starwarspinballmachinebys47777.techionblog.com/19907778/the-definitive-guide-to-fish-tales-pinball-machine-by-williams