The dead arising

Once you have evacuated Andrew and Alden, your two best friends, you all rush down the hall. All at once, you hear screaming coming from shop class.
"Guys we-we have to get out of here!" Andrew yells.
"Can you explain how we'll get through that!" You point at the main door of the school, surrounded by those- things."
"I might have an idea." Mr. Homer says.
I pointed the scalpel I had in my locker from science class at him.
"You'll turn."
"I know hun, I knew this was comin' little did you know, you should too."
"Look, zi will drive this thing through your head if you even try to turn on us."
"Look, Kill one."
You don't hesitate, Grabbing the scalpel, you stab one in the head.
"Now. Open it."
"Wha-"
"Come on, Cristi, you were my best science student in sixth grade."
"I haven't had you as a teacher."
"You've had me as a sub."
"Oh, right."
"Never mind that. Make an incision beneath the lower temple and from the chest to belly button."