Also go ask your full size aircraft cousin to go over to that hot Lycoming or Continental and swing the prop with the ingnition off. Or for that mater just stand next to the prop. Watch their eyes get big as they quickly tackle you before you get there. Continental and Lycoming tell you that in their manuals .......dont stand near a hot engine.

All it takes is to get whacked one time by a big Tiger and you'll be a turned into a believer.

LOL
jds