What is the worst possible thing that could happen on your first day at the new high school?

For a girl, you could get raped in your classroom...
For a guy, you could get a boner while staring at a guy...

These are personal experiences that I have witnessed before... (I have not encountered these issues but I have seen others)

You get your first period
Your best friend ditches you
there is a tornado
there is a tsunami
there is an zombie apocalypse
the world is exploding