Nick and Ellis are the main characters of the game Left 4 Dead 2, which they along with Rochelle and Coach fight off hordes of zombies.

CEDA is the government agency made for the containment and study of the virus outbreak that caused the zombie apocalypse, and in the game they're not doing a very good job (lol).

In this comic, it's supposed that Ellis is just a whackjob who probably thinks his personal doctor, Nick, is on his zombie fighting team, and CEDA is the name of the mental institution not the government agency.

oh.... i dont want all these feels you can have them back now.

sure whatever man

i didnt kno this was a left 4 dead post

I mean....
Did you even read the title....?

i misread it as l4D. i thought it was l33k

1337 = leet, not leek just so you know

whoops typo

teehee

you really don't know about left 4 dead 2?

I didn't thumb you down, I just asked

I did not. Though, I think I know where you're going with this

Tell'er I sais hi