I learned this lesson Thursday evening. Another pilot and I are on the same frequency (40). He asked if he could squeeze in one last flight before I went up again with his Big Stick and brand new Evolution engine. "Sure", I said. A couple of minutes later, he said he heard flutter while heading straight down at full throttle, then quickly throttled to idle, lost control of his elevator went straight into a lake. A truely spectacular crash. After he swam back to shore, he informed me of that law: Never say one last flight.

So I told him I'll have another flight since frequency 40 is free and landed safetly.