That sounds like a type of rest-pause training. Normally with rest-pause you'd hit failure, wait 10 seconds and then bang out a few more reps. In this case instead of overloading the muscle with volume you do it with weight. So start by using a weight that you would hit failure in about 3 reps. Do the three reps, put down the weight, count to 10, do three reps, put it down, count to 10, do three reps and repeat until you've done this five times.
There is a ton of shock techniques like this: drop sets, reverse drop sets, rest-pause, FST-7 and on and on and on... So don't focus on this one technique like it'll be the silver bullet. Do em all!!!!! lol... Sure sounds like it'll give you a good pump though.