Carelessness is sometimes referred to as the seventh column. Through the conduct of experiments, safety engineers work hard to prevent accidents and injuries associated with the seventh column. One such experiment is a simulation of highway driving. The test subject, Falstaff Pratt III, is provided a series of highway driving situations which may prove dangerous if not handled correctly. Most personal injuries occur in the home. Pratt may face the seventh column at home with smoking in bed, with a greased instead of waxed kitchen floor, with descending a poorly lit or poorly maintained steep staircase, or with an overcrowded shelf of materials. Seventh column workplace accidents can also happen to Pratt. The safety engineer’s work may prevent many of Pratt’s falls, which may benefit Pratt even if he is considered the Indestructible Man.