I got into a habit of asking my assistant "who's on first?" when I wanted to know what I'd missed while I was out. After a few times, I realized she didn't get it (she's 21) but to make sure, I said
"
Who's on first.
What's on second.
I don't know...
THIRD BASE!"
Yeah, she looked at me like I was completely insane and she was debating on crawling under her desk while waiting for the white coats to appear (which almost led to me singing "they're coming to take me away haha they're coming to take me away hoho hehe haha to the funny farm...")