"This was an extremely dangerous thing for him to do. If he had continued to cling in there with the aircraft taking off at over 320km/h, he might have fallen out and could have been sucked up by an engine," she said.

"If he had survived that and was in the wheel well when the landing gear was retracted, he could have been crushed by the mechanism. And if not he very likely would have frozen to death during the 15-and-a-half hour flight at 9,150 metres while wearing no clothes."