Huurdle
Lets see the possibilities here: Alt 507 - Likely Escaped scp - less likely but still there 001's flesh zombies - likely Foundation staff - incredibly unlikely consider the site has been breached Some other entity aligned with order or possibly even chaos? - Honeslty not sure as they haven't appeared yet but its about as likely as Michael getting into a fight with whatever is following him unprovoked Also am I a bad person for immediately thinking to myself when I read the last line about the scene from the beginning of chapter 16 (the "Come out or I'll start throwing flashbangs")