this is a slight tangent but i just thought of it reading this thread....
never go through a revolving door with your camera slung behind your back and a flash mounted to it. i did this once and soon heard a sickening "crunch" and a slight tug at my back. turn around to see my flash wedged in between the revolving door an the door frame. the door ripped it right off the hot shoe mount but thankfully missed my lens!
i can laugh about it now...not so much when it happened.
5D3, 5D2, 5DC, s15mm Fish, 24mm TSE, 35mm F1.4L, 50mm F1.2L, 85mm F1.8, 100mm F2.8L, 24-70mm F2.8L, 70-200mm F2.8L, 580EX, 580EX2, 600EXRT