Another thing to be aware of when starting a plane is the prop can come off and fly into you. I saw one stuck into a guy's forehead. It wasn't a serious injury, but a half inch lower it would have hit his eye. So, crank down those prop nuts.

Once the plane is started, most guys like to rev the engine to make sure it's running right. When you do that, make sure you're behind the prop, and nobody else is close to the model in the plane of the prop.