Hi Dick!
>>always [prepare yourself as if the engine was going to start] at full throttle<<
You know... that will be my aphorism from now on!
I was a commercial builder for years. I've handled some serious tools and equipment. I've never been hurt by the tool or equipment I was using. OTOH, I've seen some grizzly accidents... too many to count. Anyway... I'm supposed to know better.
I think I'm just getting old.