I was walking home tonight, and it was pretty late, so when I saw a (presumably) homeless guy at the street corner calling things out to random people, I considered taking a different route. But as soon as this thought crossed my mind, he made eye contact with me and went, "Hello! Happy Valentine's Day!" and walked in my direction. He looked so cheerful that I laughed and went, "Happy Valentine's Day!" back. He looked in his thirties or forties, a mid-height black guy who reminded me of Jamie Foxx in The Soloist. He held a cup with a long-stemmed red flower inside, and after I replied, he smiled at me and said, "Here, this is for you!" and handed me the flower. After his insistences, I took it and thanked him, and then as I walked away, he called after me, "Have a great night!"
It was a completely random act of kindness, and I smiled all the way home.