Okay, it's not "Who's on first?" or even "Four candles" but today, in my search for change for a ten pound note, I had literally one or two seconds of light relief from my misunderstanding of "I've got £2 coins" as "I've got two pound coins."
Oh, how we laughed. Bet you're glad you stopped by now, aren't you?
Actually, for a bit of added value (I'd feel bad for such a shite blog post otherwise), here's the 21st Century equivalent of "Who's on first?"