I wasn't entirely sold on what I'd written for this comic before I got to "bowling platform shoes."

Bowling platform shoes are why this comic exists as it does.

I'm not entirely sure what imaginary Susan is doing? I sort of imagined her doing something with her hair? Maybe some of it got in front of her, and she thought "I'm too COOL for THAT," and she brushed it aside?

Or maybe she's making sure her nails are as cool as she needs them to be? She needs to make sure they're cared for just enough to make clear to everyone how little she cares.