Liam Kennedy, the partner responsible for technology at top Irish firm A&L Goodbody, was hard at work one recent morning when he heard a terrible noise behind him. Turning around, he glanced out of the window of the high-rise office building and found himself face to face with a middle-aged Chinese man dangling upside down from a rope.

Despite the initial shock, Kennedy realised that there was something familiar about the face in the window. “Then I remembered,” he said. “That morning Jackie Chan was using our building as a prop for his latest movie.”