Heidi Chalkley, 40, was dragged to the mechanism of the metal shutters in an underground parking garage in Cambridge.
A mother of one asked a friend if she had ever held on to an automatic garage door when it opened a few moments before she was dragged to her rollers and killed, according to an investigation.
Social worker Heidi Chalkley, 40, was pushed into the mechanism of the metal shutters in an underground parking garage at Ruth Bagnall Court, Cambridge, after she grabbed him with her arms.
Her friend Susan Gilmore watched in horror as she stood three feet off the floor, before the blood began to come out of her mouth.
A man who lived nearby tried to push her through the legs in a desperate attempt to save her, but the paramedics told her it was too late.
On the day of her death, Ms. Chalkley parked her vehicle in a parking lot under Mrs. Gilmore's house.
Gilmore, who had known Chalkley for a year, told him his research today: [the door] Heidi came up and said, "Have you ever kept it while going up?"
& # 39; Heidi grabbed the blinds. I thought she was going to let go. She began to panic when her hands were trapped in the barrier.
The jury at today's hearing was told how, after the horrible incident, Ms. Gilmore called 999 from her home and returned to the garage doors, where there was a man and two women standing.
In her statement, she said: "Your head was angled. I saw blood coming out of her mouth and she was not breathing.
The garage of Ruth Bagnall Court in Cambridge, where Mrs. Chalkley died after being trapped in a defective garage door
James Spitale, who heard shouts from his backyard, said he ran after hearing "something about a head."
In a statement from a witness, he said: "When I got there, I looked at the woman and saw that the woman's head was stuck in the locking mechanism on top.
I was hanging about three feet from the floor and there was blood coming out of her mouth.
– She did not move at all. I stood behind her and grabbed her by the legs. I did everything possible to do everything I could.
An autopsy found that Ms. Chalkley (pictured) suffered fractures of the jaw, ribs, spine, and arms. The cause of death was multiple injuries.
Mrs. Chalkley's father, James (left), his son Callum Smoothy (center) and his ex-husband Andrew Smoothy (right) appear in the photo today outside the survey.
A post mortem examination showed that Ms. Chalkley had suffered fractures in the jaw, ribs, spine, and arms.
At the hearing in Huntingdon, Cambridgeshire heard that the two friends had gone to Mrs. Gilmore's home in Cambridge around 7:15 pm on August 14, 2016.
In a statement given to the police, Ms. Gilmore said that she left her car in the underground parking lot under the residence, while the two friends went out for a drink.
Then they walked back down the parking ramp, since it was the quickest way out, when Chalkley ran in front of her friend and pressed the button to open the door.
The social work colleague, Mrs. Gilmore added: "Everything happened so fast, in a matter of seconds."
The jurors heard that she called her friend: "Do you hear me? Talk to me, talk to me, but I got no answer.
Emergency services in the place where Mrs. Chalkley died. A man who lived nearby had tried to push her by the legs in a desperate attempt to save her, but the paramedics told her it was too late.
Police at Ruth Bagnall Court, which was built in 2004 as part of a housing plan for key workers, such as teachers and firefighters
The jurors were told that the paramedics told Spitale neighbor later that it was "too late."
Mrs. Gilmore described how a firefighter approached her and told her that Mrs. Chalkley was dead.
The cause of death was confirmed as multiple lesions.
Mrs. Chalkley's mother, Norma Garrett, is seen today outside the investigation.
Ruth Bagnall Court was built in 2004 as part of a housing plan for key workers, such as teachers and firefighters.
Graeme Warden, a safety and health inspector with the Health and Safety Executive, told jurors that the underground parking garage door had been "subject to multiple repairs" since its installation.
He added that there had been numerous reports of breakdowns and vandalism at the door.
Paul Arnold, an inspector specializing in electricity from the Health and Safety Executive, conducted tests on the shutter doors after Chalkley's death.
This included the testing of two laser devices for presence detection & # 39; at the top of the door.
Arnold told jurors that, if the detectors had been configured differently, "it would have been unlikely that Ms. Chalkley had suffered fatal injuries."
He added: "If it had been configured as it should have been configured, either of the two upper beams of light that are obstructed would have stopped the door."
A statement from a witness provided by Ms. Chalkley's family said that "hundreds of friends considered her her best friend."
Mrs. Chalkley was described as a "beautiful, successful and accomplished young woman" who was "highly intelligent and driven".
He added: "Without it, this world is a much colder place."
The investigation, led by forensic assistant Sean Horstead and expected to last two days, continues.
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