That's too funny Joe. The back snap starting?? It's nothing I teach any of my students, never have, never will. I do show them how to finger start an engine and how to keep there fingers away from the prop, it's sort of a lost art but the old farts will recall sitting in front of there 1/2A control line planes flipping away, maybe a free flight?? While I'm showing them that I am also handing them a chicken stick I made up for them and telling them to use it. When someone sees me back snap an engine and asks me to show them how that's the time I will show them. People see it done and they freak out about it thinking some of my parts are going to be removed!!! {As posted!!} Truth is your fingers are quite a ways away from the cutting edge of anything. I can't back snap my Kaos with the OS .91 in it, the spinner is only 1 1/4 inch and most of it has been cut for the prop so the spinner itself is a cutting edge.