I'm not positive but I get the feeling he's implying an offshore hot turn.
During offshore landings without shutdowns I don't stop the blades and have never been with anyone who suggested it.
I have stopped blades with a single engine shutdown on scene calls in an air ambulance roll where it's not going to be long on the ground. I still ensure all crew movement is as if the blades were still turning in case of rotor brake failure.
Nick on the C+ and C++ with manual rotor brakes I believe you'll find you can do a rotor stop with both engines at idle; can't say as I ever have though.
Regards,
bb