“I thought it was going to take weeks and you can do it in a couple days,” says Baer, who moved to Evanston with his family from Lincoln Square, in part because it’s on the ‘L’ line. “And I was sitting on the train with my yellow legal pad, just looking out the windows madly scribbling. A lot of what’s in the show really did draw from me just spotting things out the window. As much as I’ve been riding the ‘L’ my whole life, I would see things out the window and would just think, ‘What’s that?’