A hipster robotic arm that stops you listening to any music it deems "too mainstream".
The hipster-robot is a robotic arm (http://www.maplin.co.uk/p/robotic-arm-kit-with-usb-pc-interface-a37jn) controlled by a Raspberry Pi, which monitors the music playing from Spotify on your laptop. Play any artist currently in the top 100 artist "hot list" (the "top_hottt" API from The Echo Nest), such as Taylor Swift or Just Bieber, and the robot kicks into action, pressing the spacebar on your computer to stop the music playing.
Watch it in action here: https://www.youtube.com/watch?v=rU8XKYpN3nY