I always start my engines standing up. I flip the plane over if it has an inverted engine. I always tell my "helper" what we will do beforehand. Once started, I get behind the engine and turn the plane over (if needed) while the helper gets a new hold on the model. THEN I remove the battery. The helper holds the plane standing up until I give the release signal when they then put the model on the ground and release in one motion. Since this is usually Aaron, we have it really well worked out and the only "bite" has been when an engine kicked back and the Bolly prop cut my uncovered finger. No stitches, though. I will not reach over, or around, a prop under any circumstances.
One thing I noticed about the only electric system we have is that you do not ever get near the prop and the model never needs to be turned over! LOL!!
BIG Bear
RNMM/AMM