Back in college the Philosophy Professor asked me a question (had gone outside with a bowl and and a
pepsi right before class...)
So I needed to burp right before I was gonna answer, put my fist in front of my mouth, but the smoke engulfed my fist

.
The Professor starts laughing and to the whole class: "<insert my name>, did you have a good breakfast this morning??"
I just nodded and smiled and turned beat red

It happens if you try to take too big a hit, hehe.