My mental fortitude is too strong to suffer hallucinations.

[ Spoken like a guy who believes himself to be above physical ailments... But he is pretty strong. So he can probably go like. A week without sleeping. ]

Your concern is noted, Ms. Woods. Trust that I have seen far worse than this, and know my own limits. This is far from them.

[ OK, but what's Xenk like when he's at his limit?? Yikes. ]