Once in Harvard Square, we stumbled upon the most fascinating street musician, Vera Meyer. She played an odd instrument called the Glass Harmonica, and was quite obsessed with Jay Leno and appearing on the Tonight Show. Vera ran through a gamut of songs with an audience member turning the crank on her instrument, and I was mightily impressed by the eerie sound. She informed us the instrument was rumored to make the musician go insane, but that she felt fine. I shrugged to myself as we walked away; sanity is in the eyes of the beholder.