There’s at least one other very similar joke, perhaps more in line with the OP than the “potato potato” one:
Again the three guys, this time sneaking into the farmhouse from the barn, where all travelling salesmen spend thier nights. As the first one steps on the squeaky step, the farmer yells “Who’s there?” He answers, “Meow,” and the farmer goes back to bed without investigating. Same same for the second guy. The third guy, of course, answers, “It’s just me, the cat.”
I think it’s the delivery of the translated passage that’s so unfamiliar.
[sub]In retrospect, I guess it’s basically the same joke with a similar punchline.[/sub]
Damn! If only I was more clever! I gotta tell you though, I really did feel dumb after Q.E.D. posted the explanation a mere four minutes after my post.
And now I’m going to act all smart and use some big words like Exgineer.