Daredevil skyscraper climber Alain Robert - dubbed the 'French Spiderman' - scaled the 60-storey Four Seasons Hotel in Central yesterday in an attempt to arouse public concern over global warming. Watched by hundreds of onlookers taking pictures of him with cameras and mobile phones, Robert took nearly an hour to claw his way to the top of the five-star hotel from the east side of the building yesterday afternoon. 'I nearly fell near the top when I saw a woman inside looking at me ... The woman nearly fainted [when she saw me],' said Robert, 47. The last few metres to the top appeared to challenge the experienced Robert, as the distance between the window rims at that level were too wide for him to grip, forcing him to move horizontally to an easier part of the building. 'Over the past two days, I didn't check this building properly. So, I was so surprised when I found this problem,' he said. Robert was arrested minutes after getting to the top floor but was released soon afterwards, as the hotel decided not to take legal action against him. 'The purpose of my climb is to raise people's awareness about global warming, a very, very important issue that has been ignored by many people,' said the climber whose autobiography, With Bare Hands, has just been published. Barbara Hou, a lawyer working in Exchange Square, was one of those watching the climb. 'To be honest, it took me a few minutes to spot the little figure on the exterior of the building. I'm on my way to lunch but I have been watching him for quite a while. It's a once-in-a-lifetime opportunity to see this, isn't it?' she said. Robert called for people around the world to use clean energy and to stop felling trees. It was his third climb in the city. He scaled the Cheung Kong Center in Central in 2005 and the Far East Finance Centre in Wan Chai in 1996. A police spokesman said they had advised Robert against future climbs.