Okay, so we're not quite Canadian living up here in NNY, but if you've ever been to Kingston, you are well aware of the metal grate bridge that exists at the entry to town. Apparently, it is nicknamed the singing bridge because of the different pitches that made by cars traveling at different speeds across the bridge.
So in honor Canada Day which is next week a group from Kingston recorded and pieced together their national anthem with just audio from car tires. It's very clever.
On a related note, a few of my friends will recall the rear tire on my bike with 120lbs of pressure exploding about 50 feet from this bridge. We all thought I'd been shot. Good times :)