film canister

His shock transformed into snarling anger in a heartbeat. He snatched up the sharpened spoon, raised it in his right hand, and screamed out words of the incantation. He dragged the rabbit in front of him, the ceremonial representation of me, and prepared to gouge out its, and therefore my, heart.
I didn't give him the chance to finish. I reached into a pocket and hurled the empty plastic film canister at Victor Shadowman.
As a weapon, it wasn't much. But it was real, and it had been hurled by a real person, a mortal. It could shatter the integrity of a magic circle.
The canister went through the air above Victor's circle and broke it, just as he completed the incantation and drove the spoon's blade down at the poor rabbit. The energy of the storm came whipping down the cylinder of focus created by Victor's now-flawed circle.


Storm Front Chapter 25, Page 283-285