POLICE say a 24-year-old French national could have killed himself and others by launching himself from a 250-metre crane in Sydney's CBD yesterday, but the daredevil has now opened up about why he did it.

Jonathan Perherin is alleged to have parachuted over a busy motorway and Darling Harbour before landing on Darling Drive in Pyrmont in the early hours of yesterday morning.

The professional BASE jumper, who has previously shared videos on his Facebook page of himself jumping off structures, said he passed the crane every day on his way to work.

"It has many lights, it's a beautiful place," he told Network Ten. "Every day I say f*** I want to jump this crane."

When asked if he had regrets, he responded: "No, because I do what I like, I know this is forbidden, but I don't regret because I'm alive."

Stunningly, he also rejected NSW Police's claim that his parachute was damaged before he jumped - suggesting the damage may have been caused after he landed.

"It's not me who made this, because if I jumped with this hole, I will die," he said.

Shortly after the leap, the French national was nabbed by rangers and handed to officers before he was charged and granted conditional bail.

Superintendent Mick Fitzgerald says Perherin could have killed himself - or others - with a subsequent check of his equipment revealing tears in his parachute.

"He's allegedly a former French Foreign Legion soldier, or that's what he claims, and he claims that he is experienced, but the fact is that his equipment was faulty,' Supt Fitzgerald told reporters.

"He could easily have killed himself or others."

When asked if it was illegal to BASE jump in NSW, the attorney-general's office referred AAP to the Summary Offences Act which states: "A person who risks the safety of any other person as a consequence of abseiling, jumping or parachuting from any part of a building or other structure, is guilty of an offence."

Australian BASE Association president Gary Cunningham says while it's important thrillseekers respect the law advocates are "disappointed" it's so difficult to get permission to BASE jump here.

"It occasionally leads to people doing jumps like the one this morning," he said in a statement to AAP.

Mr Cunningham, who is an experienced BASE jumper, says the very real risks associated with the sport mean participants need regular practice to maintain their skills.

He called on authorities to open up more areas where people can jump safely. "Most people only get four weeks holiday per year to travel overseas to places where they can legally jump," he said.

"Not being able to practice for the rest of the year just leads to a decay in our skills and knowledge and makes it more dangerous than it should be."

Perherin is scheduled to appear at Downing Centre Local Court on October 17.

- with wires