It's a Ghostbusters reference. FYI.
Here's the inked version of the pin-up I did for Spaceslugs. I'm going to try and color and a friend of mine wants to try some watercolors on it. Should be a fun experiment.
I love the way he turned out. I added a few things in the inking process, but that's allowed in the rule book if you're the one that pencilled it. Look it up.
Word balloons read: "Uhhh, guys?? I could use a little help here." and "I wonder how big his poop is." Read http://www.spaceslugs.com/ and you'll understand.