Crowley knows what's coming. This time, he's glad that there's a warning -- but Hastur's grip on his arm is still viselike. He briefly summons up a spray bottle of something from the greenhouse; he can see a brief flicker in Hastur's eyes wondering if it's holy water. Of course not. That would be utterly idiotic. Crowley shoves it towards him at the same time as Hastur vanishes the bottle itself, the contents splashing over both of them. Pesticide. It burns Hastur and he lets out an aggrieved yelp, letting go of Crowley's arm.

Crowley drops to the ground and dives for the side of the room, making sure to scramble as far away as he can, all the while thinking see you never, asshole.