If you live in a magical land of elves, fairies and unicorns, where people actually know what a turn signal is and how to use it, you may have noticed that occasionally yours will sync up with the car in front of you – creating a bond that you forget about as soon as the light turns green.
Little did you know that that same phenomenon occurs with metronomes, as displayed in the video after the break. It’s actually pretty interesting to watch, if the sound doesn’t melt your brain first.
(via Reddit)
