"Embed" was probably not the right word. It hit his forehead, leaving a nice prop end sized wound above his eye, no stitches required. It was still very startling, first because it happened so fast, and second, because the prop had to loose itself of the nut, and the spinner, and still jump up to the guy's face with enough force to break the skin.

I agree with the ability of MAS props to cut. I haven't gone to gloves yet, but I always get out the sandpaper and sand the edges until I can comfortably tighten the prop nut with the edge of the prop in my palm.