Bollywood's new flying superhero has asked fans, especially children, not to imitate his onscreen death-defying stunts after a man leapt off a cinema balcony and broke his leg.

"The action scenes are meant to be enjoyed, not imitated. Please do not indulge in these stunts," said Hrithik Roshan, who plays ‘Krrish', a Superman-style hero, who saves the world from a mad scientist.

Newspapers said at least two people had hurt themselves trying to imitate the stunts from the film that opened last week.

A 24-year-old man was in a hospital with a fractured leg in Bhopal, after he leapt from a cinema balcony and landed on the audience below.

An 11-year-old boy also suffered injuries in a separate accident, but no details were given.

"Those action scenes are dangerous... I did the action scenes with full safety precaution," Roshan said.

"...stop scaring me by trying to do my stunts in Krrish."

The $10 million Krrish opened to huge box-office collections, as children and adults made a beeline to watch Bollywood's own superhero leap from tall buildings, beat up the baddies and woo his lady love with song and dance.