King's Cross Fire is the 30th episode of Seconds from Disaster testing how did a fire killed people meters away.
Plot[]
A lighted match is dropped by a smoker down a gap in the wooden escalator at the King's Cross tube station. It ignites wax under the escalator. When someone notices the glowing fire under the escalator, the person stops the escalator. Later, a small flame rises on the steps. The full extent of the fire is hidden under the escalator. The entire area under it is on fire and the escalator aboves heats up. It gets so hot that is combusts and blasts a fireball up the escalator and kills 31 people in the ticket hall 20 metres away. The effect that happened is now called the trench effect.