The American roulette wheel is different from the European wheel. The American one has 2 green spaces while the European one only has 1. However on both, if you add up all the numbers on a roulette wheel, you will get 666.
100 Mind-Blowing Spaces Facts
Fish form orderly queues in emergencies. When evacuating through narrow spaces in sketchy situations, schools of neon tetra fish queue so that they don’t collide or clog up the line. Scientists interpreted this behaviour as showing that fish can respect social rules even in emergencies, unlike us humans.