Canning Town station had to be shut on Thursday morning after a woman got her foot caught between a Tube train and the platform.
At around 8.25am, the woman missed the platform as she stepped off the train and fell down the small gap. She was treated for minor injuries by emergency services at the scene.
As Tube services were suspended, passengers were left confused as to what had happened.
A Transport for London (TfL) spokesperson said: "Canning Town was closed this morning at around 8.45am due to a passenger getting their foot caught between the train and the platform.
"As a result, the Jubilee line was also suspended between Stratford and North Greenwich during this time.
"Our staff were present, along with all emergency services, to help the passenger and resolve the situation as safely as possible."
The woman was freed at 9.10am but a jack had to be used to lift up the carriage and help free her foot safely, according to a TfL spokesperson.
And a London Ambulance Service spokesman said: "We sent a number of resources including an ambulance crew, an incident response officer, an advanced paramedic, and our hazardous area response team to the scene. The first of our medics arrived within six minutes.
"Our paramedics treated a woman at the scene for a minor leg injury but she was not taken to hospital."
Meanwhile, passengers took to Twitter to describe the chaos at the station.
DLR services were also not allowed to stop at Canning Town because of the risk of overcrowding.
The station reopened at 9.30am but there were still delays throughout the morning.