Lovely thread. Might as well chip in.
I have to admit I was a thick passenger once. But to my defense, he had a good laugh about it.
Loading on luggage and handbags on to the umpteenth security check, the assistant receiving asked me "Are you finished?". At that moment I expected "Do you have more items?" or something like that. I just couldn't help myself. "NO, I'm Danish!" which is in fact true. And it is also true I'm not Finnish.
He looked at me completely perplexed for 4 seconds, then the meaning dawned on him, and he hid his face in his hands and laughed. The poor chap didn't get around to normal operation for another 30 seconds, but he had a good laugh. I sincerely hope no passengers were delayed because of this innocent little joke.