Last fall, Jaclyn M. Reysen of Green Lake, Wis., climbed into her deer stand, slipped, fell and died of asphyxiation when her safety belt tightened around her chest. As awful as that tragedy is, it is not so uncommon-every year tree-stand safety belts injure and kill people. John Louk, president of Ol' Man Treestands, hears horror stories after each deer season. "Some hunters slip out of the belt and fall to the ground," he says. "Others flip over in their safety belts and break their backs. Even those who wear belts correctly can die of asphyxiation, because if a hunter falls, his belt may become so tight that he will be unable to breathe."