Thrill-seekers take part in tombstoning by leaping from a high ledge into the sea.
But the practice, which has risen sharply in Britain over the last few years, can cause life-threatening injuries.
Now coastguards in the U.K. have criticised the new film for showing it in a positive light.
Fred Kaygill, of the Maritime and Coastguard Agency, says, "A 46-year-old father of six was killed last year doing it.
.This summer we have seen two broken necks among a spate of serious injuries. It is stupid to promote tombstoning and this film does nothing to help people realise how dangerous it is. This scene does nothing for the story and should not be in there."