Actually you shouldn't wrap your fingers around the back side of the prop, if it kicks back it will cut you, if it doesn't cut you, when it kicks back it will hurt like he// anyways. That being said, I always wrap my fingers around the back, and have had kick backs before, yea they hurt. The worst kick back I have ever had was from a Franklin on a PT-22 it backfired when it started and I thought it was going to pull my shoulder out of place.