If you’ve performed and heard the crowd sing your song back, how did it feel?

So I was listening to a very beautiful song, the melody was smooth and the lyrics were deep. But mid way through the song, the singer turns to his band and volumes them down to turn back around and volumes the audience up. So the band stops playing and the singer is listening to the crowd. AND THAT WAS FREAKING AWESOME gave me chills just listening to it. I think if I was a singer and I did that and people knew my song, it'd be heaven to my ears. And 100 % I'd cry right then and there. I would be moved so much. So, if you've ever played in front of a audience and did that? How did you feel? What was it like? I can only Image.
If you’ve performed and heard the crowd sing your song back, how did it feel?
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