Wack was one of five exclusive Crash Dummies paired with vehicles in 1991. His transportation was the Crash Lawn Mower. Unlike any other Crash Dummy, Wack was designed for the outdoors, wearing a baseball cap to protect him from the sun. In addition, he had a red shirt with blue printed suspenders, blue pants, and flesh-toned arms. Wack, as with most of the early dummies, was a standard two-button figure.