This may be a strange idea for a topic, but the idea is to post images of facial expressions that amused you, whether intentional (like the ones I'm about to post) or not (you just randomly paused and caught a funny inbetween frame).
The images have to be funny on their own, not a punchline for another gag, if that makes any sense. This is done so the joke won't be ruined for people who haven't seen/read it yet.
To start us off, let's begin with some stuff from World's Most Wanted Vol. 2:

(this panel is a punchline, but I cropped it out just to focus on the face)

"OMNOMNOMNOM"

I love Fujiko's pouty face.