Like I said, "every engine is dangerous" and "keep your fingers out of the way". Me and my friends, from the time we were 8 years old on, ran .049s for years following those basic common sense rules and had no problems. Sticking your finger in the prop is "reality" when you don't follow those rules. Were you an "absolute beginner" when you stuck your finger in the prop or did you get careless and forget?