PUPIL M: Sir, I can't concentrate. [PUPIL S] keeps flirting with me.
PUPIL S rolls her eyes.
ME: She just hit you with a ruler and called you a gimp. I dread to think what would happen if she didn't like you.
As it happens, both PUPIL M and PUPIL S had been moved earlier in the lesson due to bad behaviour and I was on my way over to tell PUPIL S to stop hitting him and calling him names.