Yes, collective mounted cut off/yaw servo test switch for the dual hydraulics.
And I agree with you Mr. Eacott, that's about the best option in my humble opinion. I think pulling the FFC off is a bit unrealistic. Hopefully you drop it and get it back on the ground prior to the rotation becoming to great and causing it to roll over. Going to have to be quick! I have discussed this with several pilots whose opinion I respect and it was pretty much agreed the hardest part is getting past the "Oh sh**, whats happening!" second or two time delay.