As always, absolutely astounding.
You seem to have a knack for really getting the mood to balance with your art; meaning that a lot of the jokes are in-your-face-funny jokes, and the way that you drew this echoes that with a lot of ridiculous in-your-face scenes.
Additionally you seem to know what exactly each character would have to say in these situations. I can clearly tell that you've played L4D2 quite a bit, or at least seen a few youtube videos.
Look forward to your next one!