In 1998, two bakery workers died in agony after being sent into a giant oven to carry out repairs. The machine should have been allowed to cool for 12 hours, but was only left for two.
The repair was a delicate procedure that involved crawling along a tight, 75ft-long conveyor belt that slowly cooks bagels.
Within five minutes the men were relaying terrified messages over their walkie-talkies, saying the oven's core was way too hot. But there was no way of reversing the belt and they were trapped on its journey through the oven.
lan Erickson, 44, was pulled out at the other end and died on the factory floor in front of horrified workmates.
David Mayes, 47, collapsed inside and was caught in the machinery. He died from 80 percent burns and multiple fractures.