Dublin Bus is investigating footage of a young man scutting on the back of a bus.
The practice which involves hanging onto the outside of a Bus or Luas is extremely dangerous.
The footage, taken in Finglas, has been shared on social media this week.
Dublin Bus says it's looking into the incident and has issued a statement saying the action is 'unsafe and extremely dangerous'.
It says Dublin Bus 'strongly discourages anyone from partaking in such reckless behaviour which could result in serious injury.