Completely examinable. Extremely visual. Unbelievably simple. IMAGINE: You're given a real, ungimmicked dry-erase marker. You're told by the performer to write your initials-- which the performer could never guess-- on an unprepared window. The performer briefly covers the window with a newspaper or jacket for 5 seconds while telling you that the initials are literally passing through the glass. The newspaper is ripped to the ground. You touch the window. You feel the glass. The initials-- YOUR initials-- have penetrated through to the other side. GLASS, Adam's premiere full-length DVD release, features that effect and over 14 others-- all taught in intricate detail. Note: Glass DVD does not include glass or dry erase marker. The GLASS ACCESSORY PACK will provide you with the required items.