I'm glad to see a showerthought on here. It's been awhile. And yea, it must've been a eureka moment.
ShowerThoughts
Sometimes we have those little epiphanies in the shower.. sometimes they come from other places. This is a home for those epiphanies.
Lots of seed crops pop, so corn may not have been the first they saw...but you need dried hard grain, not fresh off the cob juicy stuff
And in particular, you need special breeds of corn bred for popping. Your average corn kernel will have a very anti-climactic pop if you try to make popcorn with it, even with perfect preparation.
So, this ancient Mesoamerican farmer likely wasn't that surprised the first time he saw corn pop. It was probably nowhere near as extreme as the popcorn we know today. At some point, though, people started selectively breeding strains of corn for more impressive popping ... but those people wouldn't be so surprised by it, either. That's exactly what they were trying to achieve.
I'm thinking it was a "hold my beer" or "let's get Mikey" moment.
"Bet you won't eat that!"