back when you could still go on top of dams,we walked out on to shasta dam and i looked over the edge..my ill fitting glasses slid right off my nose and destroyed themselves on the dam face...not the only place this has happened..foresthill bridge,french meadows dam,folsom dam,and when i was 10,,we were in the navy base at pearl and got a tour of a friend of my dads kid on a subtender...i looked over the side...and plooop...right into the water....had to go to an eye doctor in honolulu toget new glasses....youd think id learn....but nooooooooo