I was doing some street shooting around a busy downtown coffee shop. There was so much going on that I wanted to get a shot of the "buzz". I did not notice a homeless guy in a wheelchair, but he noticed me. He apparently does not like his picture taken as he came charging at me yelling and cursing and creating quite a scene. This experience has taught me to do a more detailed survey of a shot before I raise my camera.
Bob
ps...Oh yeah, and to plot a clear exit if necessary.