Check out what happens when this group of friends drop a basketball off the side of a 415 foot dam in Tasmania, Australia. At first, when they drop it straight down, the ball behaves as you'd expect it to. Although buffeted in the wind a little, it pretty much falls straight down. Then, however, the guys try dropping it with a bit of backspin. What happens is incredible! It's called the Magnus Effect. We'd love to give this a go. Take a look!