So I was reading an old book - and I'm sure this one is public domain!
But for some reason, my ocular implants blacked out while reading one of the chapters.
Could you figure out why it's acting up? What phrase is triggering it?

https://github.com/openctf/openctf-2015-dc23/blob/master/challange_downloads/black_eye-48105eb57a7feba18f060e11ecafba14?raw=true

(Public domain books are legal, right?..)