1) This comic totally has side-thorax. 2) This comic is kinda racist.
TN 20 or 25 on that reflex check, if memory serves. It wasn't all that low. Also, for the record, the other fighter was out of the room when the roaches moved to her and, when Tal rolled for her, failed the fortitude save. That conversation went something like this:
"How am I doing?"
"You're covered in cockroaches."
"Also, they're in your mouth and you're too busy vomiting to act this round."