Speed of Sound


 * Name: Unnamed
 * Type: Unknown
 * Users: Kin Tsuchi, Zaku Abumi, Dosu Kinuta
 * Debut (Anime): Naruto Episode
 * Debut (Manga): Chapter 40

The user moves at the "speed of sound", as mentioned by Dosu, which normal Genin do not notice until several moments after the fact.