Despite being nauseous, dizzy, and having a headache, on top of being handcuffed to a pillar, Tosh manages to shoot him a scornful glare. Granted, it's very rare she can't manage a look like that, no matter the situation. Tosh can always find reasons to look at someone like they're an idiot.

Beyond that, she doesn't respond. It's not as if he doesn't know the answer anyway. She tried to make the lights flicker when she first woke up, just to see if she could - the resulting pain was enough to convince her not to try again for some time.