Hidden camera shows are often completely hit and miss, mainly because they rely so heavily on the unscripted reactions from the public. Every so often though, they find those gems that just fall hook, line and sinker for a prank, and give an even better reaction than you could have hoped for.
That was definitely the case for one father and son who innocently stopped and asked a Gard for directions on their way to the All Ireland Final. Completely unaware that they had walked themselves straight into a hidden camera show and were in fact asking 'counterfeit enforcement officer' Karen Doyle of The Fear on RTE 2, who proceeded to royally wind them up.
God love them, their reaction is just priceless.