Rotor brake ... I dream of having a rotor brake!
Would have been very handy the other day when shutting down on a pad, if you could call it that, right on the edge of a coastal ridge with 30 kt blowing in off the sea - rotor wasn't going to stop, ever.
Eventually with some judicious pitch-pulling, gnashing of teeth and rocking around on the skids as the transmission bounced around, it finally stopped - not very pretty at all.
The takeoff was a bit nicer though, hardly any power needed to hover or climb away.