If you have ever tried playing darts you’ll know how difficult it is getting that little pointy arrow to hit the tiny hole in the center of the board.
You have to have amazing hand-eye co-ordination, and have played darts for years, to repeatedly hit the bullseye.
However, as this video shows, it is possible to cheat the system. This guy built a dartboard which moves to make sure you hit the bullseye every single time.
This is extremely clever, and a good way of entertaining your mates down the pub. That is if you trust drunk people to be throwing darts around willy-nilly.