Might be time for some meaningful humor like "Gee thanks boss, good to know what a valued employee I am.". Then again, he might not mean You personally, he may mean the Workplace in general.
Of course, you were there, and it is hard to convey a tone in a post.
I have used humor in the past to get beyond a "moment" while still responding and giving a message about how it feels (the stuff funny stuff is made of...isn't so funny)