We fly in a gym in the winter so there isn't room for a safety line of any sort. Plus, this guy in our club decided it would be a good venue to teach kids to fly in, so there are sometimes out of control slow-sticks screaming around the place. I had one coming for me last week... some yelled (not the novice pilot, I might add) and I turned around to see it coming at my face. No abort attempt was made. Luckily, I have cat-like reflexes and got my hand into the prop to stop it before it hit me... I swatted the plane down like a fly. It gave me a very small bruise on one finger, but saved my eyes.

I won't turn my back again.