Zorbing inner and outer orbs. In 1994 three investors created the firm ZORB Limited to commercialize sphereing. Their business model was to develop the activity via a franchise system. Zorbing entered the Concise Oxford English Dictionary in 2001 where it was defined as: "a sport in which a participant is secured inside an inner capsule in a large, transparent ball which is then rolled along the ground or down hills". The orb is double-sectioned, with one ball inside the other with an air layer in between (unlike the water walking ball, which is usually a single thin-walled ball). This acts as
Dragon Ball Z Edition," which collects three individual volumes into a single large volume. However, in 2013 Viz began publishing new 3-in-1 volumes collecting the entire manga series, including what they previously released as "Dragon Ball Z", under the "Dragon Ball" name. The "Dragon Ball Z" films comprise a total of 15 entries as of 2015. The first 13 films were typically released every March and July during the series' original run in accordance with the spring and summer vacations of Japanese schools. They were typically double features paired up with other anime films, and were thus, usually an hour or less in