In the 1970s, deep-sea diving pushed human limits - and sometimes went too far. During operations in the North Sea, two divers were trapped inside a sealed chamber as temperatures soared above 120°C.

Mr Cherone's tragic death follows a similar incident in Missouri, where factory worker Nicolas Lopez Gomez, 38, died after getting stuck in an industrial oven at the Gilster Marylee Cereal Plant. Mr ...