Gyroscopic Self-Leveling Pool Table on a Cruise Ship

If you ever travel on a cruise ship named “Radiance of the Seas” by Royal Caribbean, you might run into a pool table like this. As the ship moves the pool table adjusts so that the billiard balls don't move at all, even in rough weather. If you look closely you can see that the balls remain still as the table moves, enabling you to play in almost any conditions.