NEVER stand in front of the prop or the side of it! I learned the hard way, by trying to adjust an OS 61 from the front. It took 23 stitches in my two fingers! Put them right thru the prop trying to reach the high speed needle valve.

BTW, the spinner flew to the side and spun back of the plane about 30 ft to hit the trailer. The prop nuts (2 of them) shot ahead about 20 feet. Needless to say you would be speaking with a high voice after they dug the prop nuts out of you!