We've seen the talented Diego Stocco's music from a tree and experibass. YouTube's Julian Smith now brings us something equally unusual. The combined sounds of an old Jeep Cherokee (slamming doors, pushing door locks, revving the engine, setting off the door alarm, etc) make a techno song.
According to Wikipedia, "Sympathetic Resonance is a harmonic phenomenon wherein a formerly passive string or vibratory body responds to external vibrations to which it has a harmonic likeness."