When the rowdy classmates give a class presentation and they won't stop laughing...

Dang. I thought the front of the black dudes shorts were colored badly in ms paint.

Damn, I hate it when they buffer.

loading....

If you are giving a presentation, you are in charge of the classroom. Kick them out.
.
If you are giving a presentation and you are getting graded on it, that grade isn't just the content, it's the delivery and your ability to engage the class.

I can't believe this phenomenon spans continents !