Tom Cruise is famous for doing all his own stunts, but the Hollywood star got more than he bargained for when filming Mission: Impossible 5 on the mean streets of London.

A video has leaked showing the 52-year-old stepping out into a busy road WITHOUT LOOKING BOTH WAYS - before having to quickly retreat to the kerb as a bus driver blows his horn in warning.

We can only assume that US schoolchildren don't get taught the Green Cross Code.

If you're reading this Tom, you might want to take some tips from David Prowse (aka Darth Vader) in this vintage video...

Mission: Impossible 5 is set for release next December.