Watch the surprising moment a security guard tries to stop an Irish music flashmob

An impromptu trad session was almost spoiled by a Dublin security guard.

Curious passers-by turned the handle on a 'Bosca Ceoil' which triggered a surprise session in the street.

Amid the song and dance, a sullen security guard arrived and told the revellers they "can't do that here."

The stunt was a promotion for TG4's new Irish music series, 'Bosca Ceoil'.