A video which has been circulating heavily online shows the frightening moment that three young lads cling onto the back of a moving Dublin Bus.
The incident shows the boys hanging on as the 40D bus passes a stop and goes over a speedbump in the Finglas area.
The act known as 'scutting' is the practice of hanging out of the back of a moving vehicle.
Watch as man clings on to back of moving Dublin Bus in Finglas
A similar incident happened in March in the same area when footage emerged of a man clinging to the back of another moving Dublin Bus.
The company condemned the act that showed the man riding along the back of the 40C bus as it travelled through Finglas.
He can be seen wearing a backpack as he crouches on the back of the bus and grips the grill.
The scary scenes were captioned with "There are no words...".
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Dublin Bus confirmed to Dublin Live that they "strongly discourage" such reckless behaviour.
A spokesman said: "Dublin Bus is investigating this incident. The action shown in this footage is unsafe and extremely dangerous.
"Dublin Bus strongly discourages anyone from partaking in such reckless behaviour that could result in serious injury."
