In the early morning of 5 November 1983, 5 saturation divers working on the rig were killed instantly when their decompression chamber explosively decompressed from 9 atmospheres to 1. According to wikipedia,
Diver D3 was shot out through the small jammed hatch door opening and was torn to pieces. Subsequent investigation by forensic pathologists determined D4, being exposed to the highest pressure gradient, violently exploded due to the rapid and massive expansion of internal gases. All of his thoracic and abdominalorgans, and even his thoracic spine were ejected, as were all of his limbs. Simultaneously, his remains were expelled through the narrow trunk opening left by the jammed chamber door, less than 60 centimetres (24 in) in diameter. Fragments of his body were found scattered about the rig. One part was even found lying on the rig’s derrick, 10 metres (30 ft) directly above the chambers. His death was most likely instantaneous and painless.
Investigations into this tragedy pointed to faulty equipment, fatigue, and a lack of a fail-safe mechanism that would prevent the chamber from being opened while under pressure.