I just have to share my Escape to Margaritaville story. It includes an end of Act I spoiler, so I'll use the toggle. Only click for "spoilers" if you've seen it or don't want to know the end of act I "cliffhanger." (It's not exactly a plot driven show, but you've been warned.)
I sat next to an EXTREMELY annoying couple who sang along the whole time, even at very inappropriate moments. (They weren't on their own in that.) They clearly were big Buffett fans but hadn't been to the theater a lot, which in and of itself was fine, but along with their other behavior really bugged me.
So we make it through the first act. It's very obvious at the end of Act I that it's intermission because
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they all look up at the volcano that hasn't erupted in 50 years or whatever, and it's about to blow. You know an eruption is imminent, so it's like "uh oh!" But obviously this is a fun, happy musical so it doesn't all end with them dying in a burning hellfire of a volcano right at that moment.
But the lady next to me looked at me and said "oh, my god, is there a second act or is it over?"
So I just turned to her and said
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"No. They all died in a volcano. I know it seemed like a fun show, but I actually heard it has a really dark ending."
But then I was nice and told her I was kidding, and it was just intermission. She seemed genuinely surprised.
Before that, I too had no idea this was a thing. I thought people only left at intermission because they didn't like the show.