(He is not thinking about that, at all, or about how it started with the need to reassure himself of Sherlock's humanity, or how he'd been so aware of Sherlock that whole weekend, or how -

No. No. He's been fighting not to think of it all week, he's not going to weaken now. He'll never win the fight if he weakens.)

He manages to catch the laserpointer, just barely, and looks at it.

As symbolic gestures go, it's not a bad one.