End of Class Yawn

The phenomena that occurs at school (generally towards the end of a class) when one person puts their papers away and, like a yawn, inadvertently causes the rest of the class to follow suit by shuffling their things together at the same time. The result of which is a very loud and distracting noise something like a popcorn maker in a hailstorm.

Responsible kid 1: "Hey man did you get the homework assignment from Algebra today?"

Responsible kid 2: "Nah bro, the professor was finishing up his lesson when some douche behind me started packing up."

Responsible kid 1: "Dude, what a prick."

Responsible kid 2: "Yeah, he caused an End of Class Yawn and the class never got focused enough for the professor to finish."