Turns out saws are good for more than just taking down trees—add a bow, and you can also use them to make music. Here's Natalia Paruz, aka "The Saw Lady," playing a few tunes in New York City's subway stations.
The Simpsons Theme Song
The Star Trek Theme
Music from the Movie Delicatessen
"Changes" by Scott Munson
A song composed specifically for the saw
"Lame Sonore" ("musical saw," in French) was also written by Scott Munson.