She had a front row seat to the horror unfolding in the aircraft - not once, but twice - on what was supposed to be an eight-hour flight from Australia.
Less than 2m away from her, a man dashed down the aisle and tried to open the emergency door as the Boeing 777-200 was flying from Sydney to Singapore.
The angry man had shouted repeatedly "let me out of here" on board the Scoot flight on Wednesday.
The Australian woman, who wanted to be known only as Ms Denise, told The New Paper yesterday: "He had rage in his eyes and he was screaming like a wild animal.
"I freaked out and thought to myself: 'You've got to be kidding me.' All I could think of was my son, who was sitting directly in front of where the mad man was standing."
Ms Denise was afraid that the man would use her son as a shield when confronted by the crew.
But when the Caucasian man in a white T-shirt and jeans failed to get the emergency exit open, he stormed into the empty toilet nearby. He continued to scream and kicked the door violently.
This was Ms Denise's opportunity to flee to safety. She grabbed her 13-year-old son, Beau, and made a dash to safety.
Beau, who was returning to Singapore for a school examination the next day, said: "At this stage, my mother and I left our seats and ran towards the front of the plane and informed one of the flight attendants."
They were seated in Business Class.
The incident had occurred within an hour after TZ001 had left Sydney.
Unknown to Ms Denise then, the incident was connected to an earlier announcement - made 20 minutes after take-off - asking for medical personnel.
Ms Denise, 48, who has been working in Singapore for the last 13 years, said: "Two paramedics and a doctor volunteered and attended to a woman who appeared to be experiencing an anxiety attack."
The man - believed to be in his 30s - who had tried to open the emergency door was the woman's partner.
Luckily, the crew managed to get the man out of the toilet and moved him to the rear of the aircraft.
But the drama was far from over.