A perfectly timed strike that hits the back of the pocket sounds different than most of my shots.
But if you hit it it that pure, it's a technique to try to make the next shot sound as good.
A little tougher without a public room. Nearest one I know of is here: https://www.yelp.com/biz/pockets-idaho-falls?osq=Pool+%26+Billiards
1 10' snooker and a bunch of Diamond 7's as of five years ago. No idea on action, happy hunting!