Well, it has to do with your transmitter. And that's the side with the sticks on it. When you reach the flight line , you place the plane on the ground. It's nice slow idle gives it no tendency to roll, and because it's a little nippy, you decide to put on your gloves. You put the transmitter on the ground with the antenna up so that it's nice and unstable and proceed to put on your gloves.
Nothing can go wrong.
Another case of Murphy's Law occured on a bright and balmy day when one of our members went to the field to continue his self-training on his helicopter. After starting his engine and carrying the helicopter out to the runway, he discovered his transmitter was still set up for one of his other models and, as such, a couple of the servos were reversed for the helicopter. No matter, the transmitter has servo reversing switches in the back under that little panel. So, with the engine idling and the help of another flyer who just happened to be standing by watching, an attempt was made to correct the polarity of the offending servos. So here you have a helicopter with some controls reversed and an engine at full throttle.