Many in the public gallery looked down while Mr Hansen recounted the day's details.
Just before the collision, balloon pilot Lance Hopping had flown into a paddock on Somerset Rd bordered by power lines on two sides.
He was about 7 metres from the ground when a gust of wind changed the direction of the balloon.
When it was blown close to power lines on the edge of the paddock, Mr Hopping tried to out climb them. He failed and the basket caught two of the lines, leading to devastating fire and crash.
According to emergency aviation procedure, the correct action would have been to descend in the situation.
The coroner's inquest is the last of a series of investigations and reports into the crash. Details of the day have been thoroughly documented and analysed in previous investigations.
The process, which has included an investigation by the Civil Aviation Authority and the Transport Accident Investigation Commission (TAIC), has been difficult for several relatives of those who died in the crash.
Bronwyn Brewster, the daughter of couple Ann and Desmond Dean killed in the crash, previously spoke of the challenges of the investigating process.
"Every time a report comes out, it's kind of like we're taking two steps forward and one giant step back at a time," she told APNZ.
The TAIC report found errors made by Mr Hopping, 53, ultimately resulted in the fatal crash on the day.
It also established he had cannabis in his system at the time of the accident.
Mrs Brewster is due to give evidence later today.
The inquest, before Coroner Peter Ryan, is set down for four days.