Roy Calabi thought he was well past his days of sliding down in his seat when he felt uncomfortable. Unfortunately, this morning was full of surprises, a couple of the smaller ones being: one, that he suddenly found himself falling back on this habit, and two, that in the years since he’d last attempted it, he’d grown too big to pull it off. Now his knees merely bumped painfully against the bottom of his desk, and he had to wriggle his way back upright forcefully enough to come unstuck, but quietly enough not to draw attention from his classmates. It was an ungainly struggle, but he managed.
The bigger surprise was less easily dealt with.