Photo: Work Trikes We See Around Town: Underwater Piano Shop

The Underwater Piano Shop trike, parked on the corner of Spring Street and Sixth Avenue (picture by Kate Hinds)

Perhaps, my aunt theorized, "he calls it 'underwater' because he sometimes tunes below C level."   Other thoughts, theories?  Why would you need  a trike for a piano store? Who else would use a trike?

Chinese speakers, out there, help us out?