“According to The Wall Street Journal, printers are among the most in-demand objects in ‘rage rooms,’ where people pay to smash things with sledgehammers; Battle Sports, a rage-room facility in Toronto, goes through fifteen a week. … Unsurprisingly, the engineers who specialize in paper jams see them differently. Engineers tend to work in narrow subspecialties, but solving a jam requires knowledge of physics, chemistry, mechanical engineering, computer programming, and interface design.”