You know you're in the Harvard Square T station when ...

[petardier]

the musician is playing a replica of a 17th century French hurdy-gurdy. It's a bit like a large 6 string violin, but with a crank and keys to finger.

Comments

[ruthling.livejournal.com]

this guy has been making the rounds for about a year. I've seen him in Davis and downtown near Fanuel Hall/State Street station.

The instrument is nifty-looking but the "tunes" grate after a very short while.