Yes, Pillows CAN Bite
Theme 42: Silencio


How the mess had begun, none of them could say but, now that it had, it continued to grow at a fantastic speed: they had been engaged, only an hour ago, in a pillow fight that resounded with laughter, "Eeeek" and "Ouch, you hit me in the Unmentionables, James Potter!" but now the pillows lay around them, a heap of feathers, and the only that had survived had two arms, one eye, and several antennae.

"We can't tell anyone, can we?" Wormtail asked, and Sirius gave him such a withering look, he backed away. James frowned - he was holding the pillow by one arm, and it struggled against his grip while Remus held the thing's other arm - then used his free hand to tap the pillow's head [yes, the pillow had hair, let me clarify - in fact, a luscious, pink crop of it complete with side bangs]. The pillow yelped as the wand came down on its head, bared its antennae, then opened its mouth [a rip in the cloth, with one big tooth poking out of it] and, "RAAWWWRRR."

"Oh my," James said, his eyes huge.

"RAAAAAAAAWR!"

Remus sighed. "Silencio!"

The pillow bit James in response.