What do you get when you cross a hamster ball with a roller coaster, super size it so humans can go in? And if that's not enough, let's give it motors so you can drive it ... Behold, the Buzzball:

At the heart of the Buzzball is a dual motor configuration, enabling the pilot to control the motion and direction of travel via left and right control triggers, which provides power to the driving wheels. [...]

Once the Buzzball is in motion the pod maintains an upright position until the pilot turns, causing the pod to rotate inside the ball against the direction of travel, which applies a braking force and the pod to lock with the ball. This causes the pod to rotate with the ball until the weight of the pilot and pod overcomes the inertia forces and causes the Buzzball to change direction.

This is when the fun starts, as the speed will affect the degree of rotation of the pilot and pod from a partial barrel roll to complete and multiple rotations!