She needs to learn how to ease them out. Technique is important. Find an empty isle at the grocery store and slowly walk down it while silently letting it out.
Then...wait down at the end and watch the facial expressions as people come down the isle.
“watch the facial expressions as people come down the isle”
I guy I worked with called them “air biscuits”.
hehe.
What is really fun is to let one and look at someone near by like you think they did it. snicker*