You’ll shoot your eye out.
Use golf balls... they REALLY go.
LOL. My dad did the same thing for me!
When I was 8, I got a ticket (like a $1,000) when I was 10 for firing rocks back at light speed at arab “protestors” (who were throwing rocks by hand and couldn’t reach) at a deal at Arbaham’s tomb.
I’m probably lucky I didn’t go to prison.