When the 'popcorn' button on the microwave is 3 seconds too long

https://dubvee.org/post/2235362

I’ve never fully understood how the ‘popcorn’ button on microwaves work

Say no more. Must watch

What's the deal with the popcorn button?

YouTube

TLDW: The moisture sensor might be on the right side of the microwave, and the bag was pointing left when the steam was released.

But that was definitely worth a watch.

Would that mean best practice is to point the most-likely-to-pop-open end towards the center of the rotating plate?