Behold, the gag reel. Long a staple of the home video market, the gag reel was perhaps at its most popular in the 1990s, when Jackie Chan released a string of movies that included painful outtakes during the closing credits. When studios realized that they could package an entire DVD release around the special feature menu, the gag reel became a mainstay of any comedy releases over the last 15 years. And because Deadpool was one big improvised joke with enough physical humor to make Mel Brooks blush, it was a natural fit for the film’s Blu-ray release as well.