started humming a song because the person sitting across was humming but you hummed something different so they'd change their song? (It didn't work but I tried lol.)
I dont sing or hum, I know I can not carry a note sooo, why be the cuase of serious distortion of others fine art.
next time bring a pocket knife and a stone and when he starts pull the knife and stone and begin sharpening it to his little tune and smile at the same time.