This suggests that the gluteus maximus functions both to produce high levels of force at low speeds through small ranges of motion, as well as low levels of force at high speeds through large ranges of motion. (strengthandconditioningresearch.com)
Keeping your palms pressed together and your hips facing forward, rapidly move the barbell in a very small range of motion from left and right so that your hands oscillate as fast as possible between the two imaginary walls at your sides. (nicktumminello.com)
The way it differs from the dynamic oscillatory stretch is that the oscillation in the ballistic stretch is done in a very small range of motion at the point where the muscle is fully stretched. (ashotofadrenaline.net)