Bad behavior on the ground can also damage a pilot's good conduct reputation. John said he got a wake-up call about what he was doing to things behind his old Citation when mechanics had the engines running. "Another mechanic ran and got me, and said, 'John, I want you to look at this.' The engines were at idle, but a pick-up truck about 100 feet behind the airplane was rocking from side to side. The mechanic asked me, 'Can you imagine what would happen to that truck if the power was advanced?' I got the message. I had been using too much power when leaving the area, and had no idea what I was doing to everything behind the airplane."