Years back, I was hiking around 4 Peaks east of Phoenix. As I was walking down a trail, I saw what I first though was some kind of large bug. It turned out to be a hummingbird making a bee line for my St. Louis Cardinals red ball cap. He flew up to me and stopped right above the brim of my cap. He then backed up about 18 inches in front of my face and hovered for a few seconds then took off around me.
I think he was pretty disappointed in what he thought was a really big red flower.