I can remember asking my instructor the same question, and an evil grin crossed his face. I knew what that meant... time to go find out the hard way.
At near Vne and 25' in a 206, he rolls off the throttle. Exactly like What Limits says. Hauled on the cyclic to gain altitude and pulled hard on the collective to keep the Nr green. We shot up like a cork, the G forces were huge!! Within a few seconds we were level at 400' and 70 kts. A simple 180 turn and we were into wind for the landing.
About as much fun as you can have with your pants on.
