I was Just Playing the Map on Single player You Know. Running Around and Stuff. But all the Sudden. The Map Has This Slight Green For Some Reason While Some Kind of Faint Buzzing Noise Starts Playing (I Was at the Bottom of the Map When it Started to Happen) so i Walked up The Stairs to see What is Going on. The Buzzing Gets More Intense Then Black Russian Text Started to Flash on the Screen (I Only Speak English so I Don't Know what it Says) as i Walk up to The Third Floor. What Sounded Like a Distorted "O Fortuna" Starts to Play The More i Walked up the Louder it Gets. Then i see Tall Black T Posing Figures With Glowing Eyes Showing up in The Distance For Half a Second then Disappear The Physics gun in My Hand Started to Flash for 5 Seconds Before it Disappear and Make this Unnerving Sound That Lasted for 2 Seconds. i Went to The Top of the Map and all The Sounds Stop For Some Reason and See Some Silhouettes of What Seem to be some Floating bodies and a Big Object Behind Them. i Came Closer to the Entity's and One of Them Exploded and Got Replaced by a Poison Zombie Without The Headcrabs. i Walked up to them And Flash my Flashlight And What i Saw Was a Group of 9 Floating Corpses and a Giant Head Apparition of What Looked Like a Realistic Skinned man With one Eye Starring at me and the Other I Don't Know. This Happened in 2 Seconds Before Disturbing Images Like (Gore Horrifying Faces illegal Alien Photos Kinds of Stuff Like This) Shows up For What Feels Like a Minute While the Dramatic Part of O Fortuna Starts Playing But Now is Now Undistorted and Very Loud (So Loud it Almost Break My Headphones) Then My Computer Crashed. i Turned it back on and it is All Normal Apparently But Except a Virus Named "MISTAKEMISTAKE.EXE" Showed up as The Only Thing i see in my Desktop no Trash Bin and Taskbar Witch is Unfortunate for me and My Mouse Started to Slowly Hover into the Virus and Auto-clicked it Witch Opened the Virus. The Virus Started To Show the Disturbing Images i Mentioned for a Millisecond Ant Started to Play Unnerving Sounds and Music and Kept Rearranging and Deleting my Files (Even Messing With System 32) Then i Restarted My Computer Many Times But it Just Gets Worse and Worse...

i Took 3 Screenshots of The Indecent Because i Like to Take some Pictures...

This image was Taken When i Tried to Capture the Russian Text but Failed:
https://steamproxy.net/sharedfiles/filedetails/?id=2938494828

You Can see some Silhouettes of The Entity's (8 Floating Corpses 1 Poison Zombie and a Head)
https://steamproxy.net/sharedfiles/filedetails/?id=2938275760

Perfect Timing (the Creatures are Red For Some Reason)
https://steamproxy.net/sharedfiles/filedetails/?id=2938275992

Lesson: if this Map Turns Green and You Hear Buzzing Noises. Quit Your Game!