You were on a mission not expected to return, You had gone through hell by this point, getting attacked non-stop, your about on door 64 when the lights flicker, you think its just a normal entity and you hide in a locker, just for it to stop right outside and start shaking your locker violently, making you struggle to hold it closed

"JUST LET ME IN YOU FUCK!"

It yelled out as it thrashed you around inside, your arms were getting weaker