Terrified Tube passengers were stuck on a carriage which was rapidly filling with smoke for three-and-a-half minutes.
An official report into the accident at Holland Park Station on 25 August says that while the main doors were still shut, some passengers tried to squeeze out by opening the side doors between carriages.
Pictures from: Adam Pajda
Despite the panic, no one was injured. However the Rail Accident Investigation Branch said:
"There was potential for injuries to occur because the train was heavily loaded and a large number of people were prevented from leaving the train for almost four minutes after it stopped."
More top news
Senior Labour candidate and London Mayor contender David Lammy has admitted to ITV News that a post election deal with the SNP is possible
With the deadline for voting approaching at midnight tonight, here is how to make sure you don't miss out.
A woman has been given a prison sentence for stealing money from coworkers to fund her lavish wedding and buy bikinis for her honeymoon.