You were sitting in class. Droning out the window as the teacher was explaining some random subject. Without realizing your pen accidentally rolled off your desk.

A boy who sits behind you noticed and pondered if he should say anything. After a moment he sighs and learns forward to poke your back with his pen. When you turn he says.

"You dropped your pen." he explains and points to your pen on the floor.

"Jeez this girl needs to focus.." he thinks to himself while eyerolling.