[The effects of the stun wear off at last, and Severus jerks his arm away from Sirius, his upper lip curling unpleasantly, as though disgusted by even the briefest moment of physical contact between them. He rises to his feet, drawing up to his full height, his own glare darkening with deep-seated anger.]

You have no reason to believe me, just as I have no reason or desire to explain myself to you, Black.

Accio wand.

[The wand struggles beneath Sirius' foot before wrenching itself free, flying back into its owner's hand, his spindly fingers curling around its handle.]

This is neither the time nor the place for you to air your grievances, you arrogant fool.