Danny Boyle has vowed never to go camping again.

The filmmaker spent six nights sleeping outdoors at Bluejohn Canyon in Utah while researching new movie '127 Hours' - a true-life account of Aron Ralston's experience when he was trapped by a fallen boulder - and admits he is unlikely to ever repeat the experience.

He said: "We camped out in the canyon for six days.

"It had been 30 years since I'd been camping and it'll be another 30 years before I do it again."

The 'Slumdog Millionaire' director also admitted he is still clueless as to figuring out what an audience likes to see in movies.

He added to the Daily Telegraph: "You just kind of follow your nose.

"You don't think about whether it will be financially rewarding or make you powerful. You just follow the story you want to tell, and that's what I've always done, and sometimes they work.

"I made this film, 'Sunshine', which I'm really proud of but nobody went to see it, there was nothing you could do to make people see that film. And then I make a film, 'Slumdog', and you couldn't stop people watching it."