When someone makes a smart remark back at the teacher

The hardest thing ever.

That face is accurate...and awesome!

I don't think I've laughed at a reaction face longer than I did when I saw this one.

I always do that. Same with at the doctor. Yesterday, I was at the doctor getting an allergy test and I was laughing uncontrollably as they were putting 90 needles in my back. The doctors were very concerned.