In my opinion, the only "SAFE" place to be would be behind the prop, defintiely not standing in front of it. The tach reading could be obtained from behind the prop just as easily. What direction would that prop go"IF" it did come off? I don't understand why someone would want to be in the area that rotating monster is trying to get to.[]

the stamp says "52" as in magnum 52

Joke of the day-- How many Model Aviation writers does it take to tune an engine?

answer: Five. One to hold the throttle, one to hold the tach, one to hold the camera, one to read the instructions, and one to dial 911.

The hand holding the tach isn't a nail biter, that's evidence of a prop bite for sure.
Shows he didn't learn the first time.