That bowling balls fall is an example of micro-gravity. Macro-gravity is only a theory. They don't fall on their own. Remember that nobody has seen gravity, and so it's just a belief. Gravity is not falsifiable, so it can't be scientific.
People use gravity to support evil things.
Anti-gravitationists deserve equal time. Some of the world's greatest scientists are anti-gravitationists. I will post the theory of anti-gravitationism as soon as I get it worked out.