Why does the popcorn bag restrict when I take it out of the microwave? Like the air was sucked out of it Does this happen to anyone else?
Basic physics - hot air expands and cooling air contracts.
It is probably because the steam is escaping.
The hot air escapes, so it is like letting some of the air out of a balloon.
the popcorn bad didn't have much air in it to start with and the popping corn replaced that so the air was pushed out of the bag.
The Lord Humungus.