Canadian authorities have warned that indoor “Monster Truck” shows and similar exhibitions are a hazard to the audiences. Holding such meets indoors can create life-threatening levels of carbon monoxide in the arena, especially in the upper decks. “We no longer permit such shows in the winter,” said a doctor from the Quebec Department of Public Health. “We only allow them during warm months so that doors can be opened to allow ventilation.” (UPI) ...Sheesh: first the shows cause brain damage, and now this.