John Sam Williamson has been a farmer for more than 50 years. He knows his five grain bins stocked with corn and soybeans very well, but he also knows the risks. “There’s a lot of danger to grain bins, but if you use them safely its like other things, gasoline is dangerous, sharp knives are dangerous but if you’re careful and do things safely you should be fine,” Williamson said. One such danger is known as grain entrapment where a worker inside a grain bin is crushed, sometimes to death, by the