Collapsing Can

First the can was filled about a centimeter. Then the can was put on a hot plate until the water was boiled. Then instantaneously, I flipped the hot can into ice water. The can then collapsed itself. The way this happened is that hot air expands and cold air collapses. When the two molecules mixed, it forced the can to suck itself in because the hot air cooled and doubled the power of the cold air inside when it was trapped.