It was enough of an issue in the Gazelle for SA to
fit a mod involving a metal bar welded at right angles to the rotor brake handle that would close the throttle if the rotor brake was applied in flight. Admittedly in an aircraft that was doing engine offs with students on an almost daily basis, hence the occasional cockup.
Applying, or attempting to apply, the rotor brake in flight is a damn fool idea and this pilot has the right idea… DFWI.