Shytorque, good on you. The back of a helicopter is the absolute worst place to be doing CPR. I'm actually quite surprised the patient survived at all. The survivability rates for people who code on scene (their heart has stopped) are next to zero. We typically wait if they're doing CPR on scene. If some kind of heart rythm is re-established; we'll fly and quick. If not, the patient needs a hearse, not a helicopter.