The Coriolis Effect Test: two hemispheres, one sink

Super-cool video about the coriolis effect. The video he refers to (which is also cool) is this one: https://www.youtube.com/watch?v=ihv4f7VMeJw and this one: https://www.youtube.com/watch?v=aDorTBEhEtk https://www.youtube.com/watch?v=pdMZjssrAlk