He awoke with a start, and came to realize he was sitting at his desk.

Looking around him, everything seemed so… Familiar…

Upon closer inspection of the classroom, he noticed that one kid to his left folding a paper plane.
Fold down, to the left, flip to the right, and “Wheeeee”…
“Wheeeee!”, the other boy yelled, as his plane took flight out the open window.

He glanced to his right, and noticed the girl painting her nails with nail polish.
“Oh darn… All over my new skirt…”
The girl was hit by an oncoming paper plane, spilling nail polish all over her lap.
“Oh darn!”, she yelled, “My new skirt!”

Yes… Yes… It was all coming together now… But what was that last thing…?

He broke into a cold sweat, and a look of horror appeared on his face.
As he slowly turned around, his eyes met with a much larger boy; cracking his knuckles.
“No!”, he yelled,“NOOOOO!”

Wedgie.