So this time Mark Rober has completed a three year long dream. He actually created a moving dartboard where you´ll always hit the bullseye. This engineer is sure to make people at bars feel better about themselves through the magic of engineering. The 6 stepper motors he uses to move the board do so in 400 milliseconds. So it´s pretty much a draw every time you play unless you are aiming at the roof !! Check his channel here for more wizardry.