I usually buy the Jiffy pop, because I just have an electric stove. I have some bags of microwave popcorn. Can I put them on range and like shake it or something?
I don’t have a glass lid to keep popcorn from flying everywhere if I just dump it in a pan.
Open it, throw the contents into a kettle, and do it the old fashioned way.
Careful: burning your popcorn is easy, and it doesn’t taste very good.
I usually go at full blast until it sounds like I’m past the peak of pops-per-second, then I shake the kettle and give it five-ish more seconds before I empty it all into a bowl.