Yesterday I was on a 2 lane steel bridge with no side walk. The floor of the bridge is one of those in grid form, thus you can see the river below it. The traffic was quite busy and I was the stupid one taking pictures on and off the bridge. Well this isn't exactly any sort of life-threatening situation, but it was a bit freaky. So given that you see a spot excellent for photo shooting, possibly an awesome shot but will risk your life doing, will you?