Sarcasm

The accordion player on the Q train is very good: his riff on Toccata and Fugue in D Minor during "Sound of Silence" by Simon and Garfunkel gets a laugh, and each song gets a smattering of applause. 

He makes his way down the car, joking and playing, until he gets to my end, where he plays a little until he notices the guy across from me taking a video.

As the train pulls into the station, he stares into the lens of the guy's phone and starts saying, "You're welcome," over and over - "You're welcome, you're welcome, you're welcome" - each one increasingly more aggressive, until finally he gets off the train and takes his musical show to the next car.

"You know, I don't think he meant that," I say out loud, but either nobody hears me, or they don't think it's particularly funny.