Here is what my direct supervisor told me in an email re: my contract renewal:
"Consider it a sort of hiatus--perhaps some time for you to deal with the things you want to work on."
The "things" in question happened to be panic attacks. This is how he addressed those:
"I still get a bit anxious before my classes, but I can't imagine what it's like to have a full fledged panic attack."
Yeah, at least he "can't imagine," but, really? Let's not compare panic attacks to performance anxiety.