I had undergone Gravel Therapy when I was a Teen.... This proved to be a traumatic experience for my mother... It was shortly after having my Braces removed from my Teeth after 3 years of wearing them... I'd been fighting with an older brother, and he scooped up a handful of Gravel from our driveway and hit me in the face with it, knocking out my 2 front teeth... It was a heartbreaking sight watching Mom desperately sifting through all that Gravel looking for them -- as though they could somehow be reattached..... It was an even more intensive type of therapy session when Dad got home from work...