Originally Posted by
ptquilts
Be careful, the bag can catch on fire in the microwave. I had a few come out with scorch marks.
So long as you don't overcook it, you should be fine.
As the original OP stated, you stop when there is about 5 seconds between pops.
Likewise when doing the commercially prepared bagged popcorn.
You just need to get to know how much popcorn for the length of time works best, for your own microwave.