The tornado that hit Catoosa, Okla. on April 24 of 1993 left behind some unusual pieces of scrap metal. For anyone who doubts the awesome strength of a tornado, there is this post. It probably belonged to a stop sign that was beheaded, but not before being twisted about like a wet noodle. Anyone taking a good hard look at this will understand why storm chasers tend to scoff at that scene in Twister when Helen Hunt clutches a pipe amid tornadic winds, but emerges without a scratch. . .