There's a fine tradition among musicians for accompanying their latest song with a trippy, weird, or just technically excellent video to woo their fans. The latest example of this comes from Ukrainian band Brunettes Shoot Blondes, whose single "Knock Knock" has been set to an endearing animated love story taking place across a variety of iPhones, iPads, iPods, and a trio of MacBook laptops. Apple's products provide the stage, but it's the creativity and finesse of the animation that really make this video worth watching. Snippets of the story play on each device for mere seconds, as it jumps around from iPhone to iPad and back to phone. This classic tale of courtship crashes its way through the iOS home screen, tumbles across a series of iPhones, and ultimately provides a satisfying - if somewhat predictable - conclusion.