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The second type is rare since it involves a pressure drop over several atmospheres, which would require the person to have been placed in a pressure vessel. The only likely situation in which this might occur is during decompression after deep-sea diving. A pressure drop as small as 100 Torr (13 kPa), which produces no symptoms if it is gradual, may be fatal if it occurs suddenly.<ref name="harding" /> [[Byford Dolphin#Diving bell accident|One such incident]] occurred in 1983 in the [[North Sea]], where violent explosive decompression from nine atmospheres to one caused four divers to die instantly from massive and lethal [[barotrauma]].<ref>{{cite book|title=North Sea Divers – a Requiem|last=Limbrick|first=Jim|pages=168–170|___location=[[Hertford]]|publisher=Authors OnLine|year=2001|isbn=0-7552-0036-5|url=https://books.google.com/books?id=lPp68NAoUF0C&pg=PA168}}</ref> Dramatized fictional accounts of this include a scene from the film ''[[Licence to Kill]]'', when a character's head explodes after his [[diving chamber|hyperbaric chamber]] is rapidly depressurized, and another in the film ''[[DeepStar Six]]'', wherein rapid depressurization causes a character to [[hemorrhage]] profusely before exploding in a similar fashion.
== Safety Measures and Protocols ==
* Oxygen Mask Deployment: Following any type of uncontrolled decompression, oxygen masks are designed to deploy automatically above 14,000 feet to provide supplemental oxygen to passengers and crew. Immediate donning of these masks is crucial for preventing hypoxia until the aircraft can descend to a safer altitude<ref>{{Cite web |last=Prisco |first=Jacopo |date=2024-01-14 |title=What happens when an airplane cabin suddenly depressurizes? |url=https://edition.cnn.com/travel/what-happens-when-an-airplane-cabin-suddenly-depressurizes/index.html |access-date=2024-11-17 |website=CNN |language=en}}</ref>
* Crew Training on Decompression Response: Airline crews undergo extensive training to prepare for decompression scenarios. This training includes recognizing signs of hypoxia among passengers, managing cabin pressure loss, and executing emergency descent procedures effectively. Continuous drills ensure that crew members are prepared to act swiftly in the event of an uncontrolled decompression<ref>{{Cite web |title=Explosive Depressurisation {{!}} SKYbrary Aviation Safety |url=https://skybrary.aero/articles/explosive-depressurisation |access-date=2024-11-17 |website=skybrary.aero}}</ref>
== See also ==
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