Crab. You do not need to bleed off a great deal of airspeed at 80kts to gain a lot of RRPM (energy). You can see the effect quite well in an R22' if you switch the gov off, reduce the RPM to 95% at 80kts and just apply aft cyclic. The RPM increases quickly and by a good amount, however it is transient and will decay again. Not scary and useful to see. No need for large cyclic inputs, no low 'g' no need to be dramatic. DS