I almost lost my lens hood when I was shooting that morning. I still was a little sleepy (I got up at 3:50 after a 4 hour sleep) and I haven’t noticed that the lens hood is not correctly attached. And as I moved to a new spot, it fell of and started rolling towards the Danube. I actually caught it after it went over the edge, which was almost quite stupid of me, as I few centimeters more I would be over the edge too. One really has to be careful :)