Even the goofy one offs can cause writer's block. So I didn't have any jokes that happen within the confines of the world of ZR, so I had a stupid Writer's Block style idea that turned into this. Plus we haven't seen Glenda and Lizzy in a while. And yes, this is the first time we've seen Lizzy having a tattoo. I figured she could use one that went with her geeky side and touched on Glenda's world. Two birds and whatnot.
