Create a character controller that uses Move, and hop on top of a sphere collider. Many times the physics engine gets stuck and the capsule collider bounces back and forth in an arc between opposite ends of the top half of the sphere. Sometimes it kind of moves in a semi circle. Trying to move off the circle doesn't usually work, you have to let it correct itself which it eventually does, although it can take up to 5 minutes (usually much shorter). Capsule colliders in general seem to be worse in unity 5 when it comes to bad interactions with other colliders. I'm seeing a lot more of the getting pushed away issue where colliders get entangled, much more so then in unity 4.