I was going to break in a newbies engine for him. I had just started the engine and got the needle valve adjusted. The engine was running at a nice idle. Suddenly the throttle was jumping up and down. I looked at the transmitter in my hand and was wonndering if my fingers had gone crazy without me noticing. No problems there but the throttle was still revving the engine up and down. I started to look around and there was another guy I had never seen before standing beside us. I noticed he had a cell phone and I asked him if it was on. He said yes. I asked him to turn it off. As soon as he did the throttle settled down and there were no more problems. Obviously the cell phone was wrecking havic with the new guys plane. Good thing it was tied down. Now there is a policy at our field, no active cell phone within 5 meters of our planes. [8D]