Though there is no good way to destroy a frame, this was one of the worst.  After riding at Walnut Creek with my family on Wednesday, my son let his bike fall into a rock retaining wall while putting my wife’s bike on the rack.  This bike has been solid contributor in the family.  I rode it for years and when I moved up into a new bike I felt lucky that he my son had grown enough that it fit him, and he has become a beast on it.    He was convinced that he could just