French Gastronomy

From this moment, Yves goes wild. The devil now seems to inhabit it.  He screams in all the cafeteria an incomprehensible language, this fact makes the students laugh oddly, who now treat him as disabled.  This has the effect of making the cook uncontrollable.  And suddenly he began to speak with a voice, but it was not his.
"I think it lacks taste!" He said. 
He suddenly caught one of the teenagers and immediately cut off his head with his chopper. A puddle of hot blood started to spread on the tiles. The head in the left hand was not white, as if this corpse still seemed alive. After that he smashed the skull on the edge of the cauldron, like an egg, to extract his brain.
The students, in panic, joined the exit as quickly as possible, but, as if by magic, the doors did not open.
A game of hide and seek was launched, but this time, it really should not be found.
Yves, very playful, lends himself to the game. His second one was so easy for him to find;  she was simply under a table. He cut off his head again, but thought that this time he would only need the eyes.  So, with his corkscrew, he extracted his eyes like a cork. A second in the closet of cans, he only took his right arm as a new ladle. He even took one of his knuckles, so he could use a coffee tuil. The victims, with him, had as much chance of survival as a cattle in a slaughterhouse. He finds them, chooses what he wants as part of the body as an ingredient, cuts it out with his chopper, in general, but puts it in his cauldron.
He had no victims left to add to his soup. The students were all bodyless, and a pool of blood covered the entire floor of the cafeteria. The level of this red lake was close to the ankles of the monster.
But all this intensely sporting game made him hungry. And, who was going to finish all the soup?  Yves offered to eat it whole. Arms, ears, eyes, brain, and other parts of the body were quickly devoured by this wild beast. He finally found his cuisine to his taste, and he wanted the students to taste it, but, life will have decided otherwise.
Yves really enjoyed his dish so much that he finished the whole cauldron. But just after his meal was over, the spirit that seemed to haunt him disappeared. The cook immediately surrendered to what he did.