1.Hide in classroom, barricade self in with desks from the inside & Outside.
And lock door.
Also say to myself "damnit what a horrible day to wear a trenchcoat
2. find the hallway with the most victims, smear blood on my body, walk calmly to backdoor, (if he's coming, and doesn't see me, drop "dead" near bodies) and climb (like tony) over gate exit.