Out of the blue clear sky

can't get the line to that one song out of my mind.
"then out of the blue clear sky"...
I say, "Hello, Moon.", whenever I see it for the first time, each night. I've been doing this for what seems like forever. This type of greeting is similar to bumping into an old friend, foe, acquaintance, etc... "Hello, Moon." I actually say it out loud, every single time. I've never experienced what I did tonight. I stepped outside, walking towards my car with my eyes towards the sky, I greeted the moon, again. At that very moment, two things happened. I witnessed the ISS shooting across the night sky and a masculine voice responded, "Hello"........ a familiar tune came to mind "out of the blue clear sky"