For their latest slow motion science experiment, Gav and Dan of The Slow Mo Guys explain and demonstrate the classic trick to break the bottom of a beer bottle with just a smack. 

By properly holding the neck of a bottle filled a bit of water and slapping the opening, the bottom of the beer bottle will shatter with great force due to a powerful vacuum created. 

With the help of their high tech, 2,500 frames-per-second slow motion camera, viewers can finally see the physics of the bar trick as it quickly plays out.