YOU'RE in the lunar module Eagle and the moon is less than 1000m below you.

Problem - you've got to cover that last kilometre and find a safe landing spot before your fuel runs out in oh, about three minutes.

It's all a bit lumpy down there. Lucky you've got a gun pilot in one Neil A. Armstrong by your side.

Well, not really. It's just archive footage through the window of Apollo 11's famous lander as it makes it descent to the moon back in 1969.

But Neil Armstrong's commentary is real.

He sat down with CPA Australia CEO Alex Malley to talk through those final knuckle-whitening minutes when he realised Eagle's auto-pilot was trying to set them amongst a minefield of slopes and boulders.

"Those slopes are steep, the rocks are very large - the size of automobiles," he tells Mr Malley in the rare "live" commentary.

"It's certainly not a place where I want to land, so I took over manually from the computer, the auto-pilot. Like a helicopter, on out to the west, to try to find a smoother, more level landing spot."

Commander Armstrong spots a smooth spot other side of crater.

"I'm running low on fuel. I've got less than two minutes of fuel," he tells Mr Malley.

The actual footage shows Eagle's rocket engine starting to kick up moon dust. A 30-second fuel warning pings.

"I need to get it down here on the ground pretty soon, before we run out," Cmdr Armstrong says.

Then a light thump, followed by the immortal words: "Tranquility to base here. The Eagle has landed."

Watch Neil Armstrong's call of the moon landing at The Bottom Line

The first man to step foot on the moon is just as famous for his reluctance to talk about his experience, having given the barest handful of television interviews since that landmark day in 1969.

Even at the age of 82, he's not comfortable in the public spotlight. Last year, his nerves were painfully obvious as he presented an Apollo enthusiast's recreation of the moon landing using Google Moon images to a US House Committee on Space, Science and Technology.

He's far more relaxed talking Mr Malley through it live. In fact, Cmdr Armstrong's ease and openness has been a noteworthy feature of the hour-long interview, which has been released as a four-part series on the CPA Australia-sponsored The Bottom Line.

A CPA Australia spokesman said the response to the series has been overwhelming and "growing by the day".

"We’ve received an extraordinary amount of feedback ... even (from) a number of Neil’s close friends and colleagues who were really pleased to see how relaxed he was in sharing his story publically," he said.

In the past four weeks, Cmdr Armstrong has spoke at length about his days in the Air Force, US Government policy, leadership, success and the deaths of former comrades.

He wound up his interview today by tackling the most controversial issue. Yes, Mr Malley went there - was the moon landing faked?

Cmdr Armstrong answers with a chuckle.

"People love conspiracy theories," he says.

"They're very attractive, but they were never a concern to me because I know that one day somebody's going to fly back up there and pick up that camera I left there."