Ever felt around a stranger: "I've met this person! I know him!"?

How I regret not telling him. Not saying a word. We were at some gathering, in a crowd. Behind us sat a black man around 30 years old and his wife or girlfriend. I glanced at him and felt the most surreal , strong feeling that I had known him well at some point in some location in the past. I felt close to him. But I didn’t say a word. Soon they got up to leave. I turned around and glanced at him and he said, “how are y’all doing?” and they walked off. I guess nobody has had this happen to them, right? Where you just knew you had known a stranger.