This one is similar to half reps only this time, on your second last rep to finish, you'll pause at the halfway point for 3 - 5 seconds. (sixpackfactory.com)
A good rule of thumb is to pick a weight that will allow you to perform a set of eight reps, but that last rep will be very tough and there is absolutely no way you could complete another one with proper form. (fitnessandpower.com)
At the last rep, hold position A and pulse up for 10 more reps, really squeezing your glutes at the top. (womenshealthandfitness.com.au)