Imagine being able to play this and then just belting it out when you come across a piano at the mall or in a subway station.

I never learned to play piano; as a kid, I learned other instruments instead. This will always be a regret for me because I wish I could play. There's something so satisfying about playing and singing a song with such a strong chord progression right before the chorus. It makes you feel warm inside to play stuff like this. I have to substitute with acoustic guitar but piano would be so much better.