From an Irish web site:

A Kerryman gets a part in a play in which he has one line. When he hears a gunshot, he is to say, "Hark, I hear a pistol shot!"
He practises for weeks, driving everyone mad saying, "Hark, I hear a pistol shot!"
So on opening night, there he is onstage and the gunshot goes off.
"What in the bloody hell was that?!", yells the Kerryman.

From a Russian web site:

A young man with a fine voice is asked to take part in a pageant-play, though he tries to beg off, saying he always gets embarrassed under such circumstances. He is assured it will be very simple, and he will have only one line to say: "I come to snatch a kiss, and dart into the fray. Hark! I hear a pistol shot..." and then stride offstage.
At the performance he comes onstage, very embarrassed already by the tight-fitting colonial knee-breeches he has been made to put on at the last moment, and becomes completely unstrung at the sight of the beautiful heroine lying back on a garden seat awaiting him, in a white gown. He clears his throat and announces:
"I come to kiss your snatch — no! — snatch a kiss, and fart into the dray — I mean, dart into the fray! Hark! — I hear a shistol pot — no! — a shostil pit, a pistil shit. Oh, batshit, ratshit, shit on you all! I never wanted to be in this damned play in the first place!"