Ha..this is going to sound silly, but the only thing that comes to mind at the moment was an incident with a dog.
I was walking home at night and had a grocery bag filled with a few things, a loaf of bread among them. A dog stepped into my path, a rather large German shepherd, and as I neared it stood it's ground and growled menacingly at me. There was no side street to turn into, and I had to go in the direction the dog was blocking. I tried to soft-talk to the dog but it was having none of it, and continued to growl.
So I reached into my bag, thinking to offer it some food (the bread). But before I could pull out the gift, the dog must have assumed I had something nefarious in the bag and ran away. Phew!