Standing in contrast to the previous post, I was busking in the Davis Square T station, and I played "Somewhere Over the Rainbow". A non-inspector T employee came downstairs from his booth, settled on the bench next to me, and said, "Play that rainbow song again."
Of course, I did.
Afterwards, as he got up to leave, he said, "You saved my sanity."
Saving T employees' sanity is a GOOD thing.