Breaking Glass With Our Screams

Summary
Mark and Ethan try various methods to match a champagne glass' resonant frequency in order to break it with their voice. After several attempts without any success, Mark slams the glass across the table and pretends as if they had shattered it.

Trivia

 * To properly shatter a glass, the person must produce a sound that matches the resonant frequency of the aforementioned object. This generates constructive interference which increases the object's vibration and eventually overpowers the glass' structure, causing it to shatter.