The basketball flies like a bird in this GIF due to Magnus Effect. It is a common phenomenon which associates with spinning objects. It drags air faster at one side. This creates a difference in the air pressure. The difference is responsible for moving the ball on the low-pressure side. As evident in this GIF, the ball moves in a curve away from its straight path. Magnus Effect has many engineering applications in the form of Flettner airplanes and rotor ships.