Crazy pool vortex – Black circles that go around the pool November 29, 2014Science & Technology / Videos & Pictures Crazy pool vortex – Black circles that go around the pool YouTube caption: This unique phenomenon can be easily reproduced in your pool on a sunny day. Related Posts: Going Around takes a Lifetime Vine Walking Around the CarAping Around: Hat Wearing Primate Bumps Around The House5 Recycled Life Hacks - Crazy Russian HackerIntroduction to my crazy Coke plan: 10 Cokes a DayCrazy Girl at Disney World gets Mad!Crazy hockey DadWeather map goes crazy live on the airCrazy and dangerous boat launchKid goes crazy after winning an Xbox One at Comic-ConCrazy vid of shooting in San BernardinoI Drive For Uber- Here Are Some of My Crazy AdventuresBaby rhino and a goat dancing around together VIDEOComments