I laughed more than I should

How does she do it?

Is it like that asian commercial where she pushes fer belly to her bubbies, but the other way around? https://www.youtube.com/watch?v=DlwFxYBBm0o

She could also be sucking in her gut and then forgetting to suck in her gut. I'm 50 and have had 3 kids and my belly isn't that big.