I actually invented twitch reps (for real). So I can’t be against it!
The way you do it is that the eccentric, turnaround and concentric need to be as violently fast as possible. And you only use a very short range of motion (like 1/3 of the range),
You can use the twitch reps in various ranges. For bench press I like to do it in the bottom of the lift to work on the stretch reflex and also to inhibit the Golgi tendon organs. For squats the middle part of the range is better. For deadlifts I would use RDLs in either the bottom or middle of the range.
You can also use the top portion with close grip benches to work on triceps firing rate.
I made my fastest improvements in the bench press around 15 years ago while using a complex of bottom-range twitch reps on dips and bench press from pins starting at the middle of the range. Went from 365 to 415 in a few weeks!
In retrospect the twitch reps on dips might be hazardous to some with shoulder issues or poor shoulder mobility, DB presses might be a safer option.
A benefit of twitch reps is to gradually teach you to stay in control of the movement while doing both a fast eccentric and concentric.
If you can keep control of the bar during a fast eccentric, your concentric will be more powerful (you’ll get a boost from the stretch reflex). Doing twitch reps, which are very short in range, make it easier to stay in control during a fast eccentric and fast turnaround. You can gradually increase the length of the range of motion as you become better at them.