An expert has said the Titanic submersible victims would only have known about their impending death just one minute before the vessel imploded.
This is what Spanish submarine expert José Luis Martín said, explaining that it shot down to the sea bed "like an arrow vertically" possibly due to a loss in stability resulting from an electrical failure, The Daily Star reports.
Martín revealed he believes the vessel would have dovetailed at around 5,600 feet "as if it were a stone and without any control".
Read More: Titanic sub implosion: Experts explain why remains are so big amid curiosity over 'vaporised' wreck
At around 8,600 feet, the "popping like a balloon" implosion happened as a result of "rapidly changing pressure", reports the Mail.
Martín spoke to Spanish newspaper Nius saying that what happened "must have been like a horror movie" for the crew.
"The starting point is that the submarine is descending without any incident and in a horizontal plane until it reached about 1,700 meters (5,500 feet).
"At that point, there was an electrical failure. It was left without an engine and without propulsion. That's when it lost communication with the Polar Prince," he said.
He explained that the vertical fall was as a result of the 400 kilos of passengers that were in the porthole compromised of the submarine.
"They all rushed and crowded on top of each other.
"Imagine the horror, the fear and the agony. It must have been like a horror movie," he added.
The expert added the passengers would have been piled on top of each other in total darkness as the freefall happened, predicted to have lasted from 48 to 71 seconds.
It lost all communication with its support vessel on Sunday, June 18, 400 miles off the coast of Newfoundland in Canada during an underwater voyage to the scene of the original Titanic – which is 12,500 feet beneath the surface.
A few days later tourists Hamish Harding, 58, Shahzada Dawood, 48, and his son Sulaiman Dawood, 19, French Navy pilot Paul-Henry (PH) Nargeolet and OceanGate CEO Stockton Rush were all confirmed to have died on the Titan.
The US Coast Guard said an investigation is ongoing.
