This is the shocking moment a man on rollerblades was filmed clinging to the back of a bus as it drove along.
Commuter Ciaran Farelly captured the bus surfer on camera earlier this week as he made his way to work on another bus.
The footage shows an "idiotic" man with a backpack and wearing rollerblades holding onto the back of a double decker bus as it makes its way through the centre of Dublin.
Speaking to the Irish Independent, a spokesman for Ireland's Road Safety Authority said: "It's idiotic behaviour.
"You're basically playing Russian roulette with your life. It's absolutely crazy stuff and it's irresponsible."
Dublin Bus, whose bus can be seen in the footage, has said it is investigating the incident, which it described at "reckless".