Kill the wabbit goblet, kill the goblet!

Splendid Oscillation
Learn how to destroy expensive glassware with the power of sound

Cool video showing a resonantly-driven crystal goblet, with a strobe slightly off-resonance. Then it breaks. And in slo-mo (though not super slo-mo, which would be extra cool)

Notice the beautiful large wobbling standing waves in the video. The points in the glass which are oscillating the most are called the antinodes of the standing waves — where constructive interference is at a maximum. The locations that seem to be stationary are called nodes. They are experiencing continuous destructive interference. To shatter the glass, just turn up the volume until the amplitude of vibration exceeds the tensile strength of the glass. Most people don’t have the lung power to do this, so if you really want to break some crockery, either use an amplifier or hire an opera singer.