Focus on getting the triceps pumped to hell with these, to the tune of 4 sets of 15-20 reps.
You want a smooth transition from the pullover into the press part. No pausing at any point. We want to let the metabolites really accumulate and focus on creating significant metabolic stress, which is why the rest period between sets is only 60 seconds.
Sure all the pros are roided out to their mutant gills. That doesn't mean we can't still learn some incredibly valuable back-training tips by observing how the big bastards train.