Tom Cruise has gone under the knife?

Sydney, Oct 19 : Shots that show Tom Cruise zipping down a flying fox in Prague (shirtless) have sparked speculations that the actor has gone under the knife.

The shots belatedly came to the attention of Woman''s Day via the gossip sites.

The mag sought to advance the hypothesis that the action star has sought a doctor to help him surgically suck it in.

''''This is all abnormal,'''' the Sydney Morning Herald quoted a Sydney cosmetic surgeon, Dr Michael Zacharia, in reference to odd horizontal markings across the 48-year-old''s paunch.

''''His belly button also has the classic downwards smile of a lipo case.''''

The mag concedes it is ''''also possible'''' that unusual muscle configuration is a result of vigorous training.