These are probably only funny if you were there at the time, but here goes nothing.
CorgiTimThonygre find the Sword Version of Me in a Dungeon

In Green's game, everybody at once is playing one adventurer, except for me, who was their sword. I was separated from them for a long time before they finally found me and were able to stab women again.
The Post Apocalypse Game Meme (Circa when that was happening)

This was made after a clusterfuck of a beginning when Endmaster frankensteined the questgiver and the robot who would pay us for the quest, together into one disgusting horrible amalgam. (Among other things.) Despite everyone thinking we had gone and destroyed the entire campaign right at the get-go, it seemed like corgi was almost eerily calm throughout this whole thing, leaving me to make this image explaining the situation.
Get In, SLEEPASS

This one was based on all the party members of a fantasy game (except the missing one) preparing to go into a dungeon and kick some ass. Except the PoV character (not gonna call anyone out here in public) who was asleep at the time.
Super STABio Bros.

This image was based on the time when both of the predominantly knife-throwing characters were the first ones to willingly run down a sewer tunnel. You see, this is funny because it's a game about plumbers. And also the loot-ninja is running along the bottom picking up all the coins.
CYBERVIC 2077

I legitimately don't know how to make this funny if you weren't there. But at least 3 people here among us (including me) will chortle at it.
Our Dead Characters Vs. Our New Ones

Me Handing Chris a Pipe to beat the shit out of Green with

This is unrelated, I just put it where Green wouldn't suspect so she'd be caught by surprise. THIS IS WHAT HAPPENS, GREEN!
The Autism Triforce

This is sort of a sliding scale representing the three often opposing energies imbued in certain players. It's rare for a GM to need (or even be able) to keep all these things in harmony.