Robbery is a 1967 British crime film directed by Peter Yates and starring Stanley Baker. Yates was nominated for the BAFTA Award for Best Direction for the movie Bullitt (196
starring Steve McQueen. In the movie Robbery a criminal gang uses a gas canister to knock out the occupant of a car and then bundle him into a stolen ambulance. There they cut free a briefcase full of jewelry. Shortly after, when changing vehicles, the criminals are spotted by the police and a high-speed chase develops with the criminals getting away.....maybe...
https://www.youtube.com/watch?v=o7LJd28c05c