Xeresgate

You try swiping a small bottle of Health Potion as quietly and smoothly as you can...

...when searing pain scorches your ass. Apparently Usoki's aim and hearing have improved.

"I know you're back, 'Nervate. I could smell you as soon as you came in! So we've moved on from Sweetroot to Health Potions have we? Give me one good reason I shouldn't burn you to cinders this very moment!"

Great. Not only have you made an overly-perceptive, expert fire mage angry, his eyes are trained exactly at your spot. The one spell was cast with naught but his left hand. As he begins to bring both together, you realize you must make a decision... and quickly!