I was probably 10 years old and myself and some kids from next door was throwing shingle pieces. We thought it was really neat how they would sail when you threw them like a frisbie. Was great fun till one of the guys threw one at that just right angle you need. Shingle sails up almost what seems like out of sight, then comes right back at you like a rocket. Hit him right above the eye and split him real nice. Half dozen stiches if I recall correctly. Needles to say it ended of that game, at least for the day.
Mac