Per 
Item #: SCP-4357
Object Class: Keter
Special Containment Procedures: SCP-4537 is to be kept in a 5 m x 7 m x 5 m containment chamber composed of 20 cm thick lead-lined steel, at Site-██. A blast door with an 8-digit password is the main entrance to SCP-4537's containment chamber. Containment chamber is to be equipped with video surveillance cameras, and an intercom system to communicate with SCP-4537. A minimum of 5 guards are to be stationed at SCP-4537's containment chamber at all times. Weekly checks for any signs of deterioration of the lead-lined steel inside and outside of SCP-4537's containment chamber is necessary.
Under no circumstance is any human allowed to come in contact with SCP-4537, unless approved by Dr. Walter Green (Who is also in charge of the research of SCP-4537) or approval by O5-█. During the time any human/humans are inside SCP-4537's containment chamber, Mobile Task Force Squad Sigma-14 ("No Clowning Around") is to be stationed directly outside of SCP-4537's containment chamber. All non-security staff is to be evacuated at least 100 meters away from SCP-4537's chamber during this time period.
Description: SCP-4537 is a humanoid clown figure, 2 meters in height. The clown makeup on SCP-4537 seems to be SCP-4537's natural skin tone, along with SCP-4537's clothes that are a part of SCP-4537's body. SCP-4537 has abnormally large feet, being 50 cm from heel to the toes. SCP-4537 resembles the famous American clown "Bozo The Clown" perfectly. However, SCP-4537 claims that "Bozo The Clown" is "An imposter! Don't be like him. He's a bad role model. Listen to my laugh instead!".
SCP-4537 acts in an extremely hostile manner, though SCP-4537 claims that "I just wanna make you happy! Listen to me laugh!". When SCP-4537 encounters a human, SCP-4537 will release a loud (90 dB) laugh that causes vivid and disturbing hallucinations in any human that hears it. All humans who have heard SCP-4537's laugh and got out in time have committed suicide. SCP-4537 will then run (Speeds have been measured up to 40 km/h) towards any human in sight, attacking and [DATA REDACTED] the human, turning them into an instance of SCP-4537-1. SCP-4537 will try to locate as many humans as possible during its "active" state.
SCP-4537-1 are humanoid creatures with an anorexic body type, showing no muscle mass at all. It is unknown how SCP-4537-1 are able to move. SCP-4537-1's skin is completely devoid of pigmentation. SCP-4537-1 seems to not have any eyes in the eye sockets, and also lack a nose. SCP-4537-1 has traditional clown makeup painted on its face, with a substance that has been proven to be blood.
Instances of SCP-4537-1 act in a very paranoid and careful manner, often seen walking around slowly with the head pointing towards the floor. However, if SCP-4537-1 is confronted or disturbed by any human, SCP-4537-1 will start furiously hitting its own head with its fists and unleash a loud scream (Sounds have been measured up to 150 dB) that ruptures the eardrums of anyone in a 200 m proximity to SCP-4537-1, and permanently deafening anyone in a 50 m proximity to SCP-4537-1. This scream will also "alert" SCP-4537 to the area, resulting in even more instances of SCP-4537-1 being "made".
Addendum: Incident log 4537-01:
The following is an incident log showcasing the events that took place at Site-██ 3/13/19██. Some parts might be damaged or corrupted. Please proceed.
Date: 3/13/19██. Site-██. Anomalous entities involved: SCP-4537.
Begin log
SCP-4537 is shown in its containment chamber, pacing around the room.
Approximately █ seconds after the log starts, a voice is heard through the intercom.Unidentified: Hey you little clown piece of shit, do a funny dance you freak!
SCP-4537: Could you not insult me, please?
Unidentified: If you would stop being so fucking [DATA SEVERELY DAMAGED]!
SCP-4537 stands still, no movement could be detected.
Unidentified: C'mon, what's the matter? Upset?
SCP-4537 starts shaking viciously, but still standing in place.
Unidentified: Oh shit, we might need the MTF squad. Oh, fuck oh fuck where's the radio! Dr. Walter Green always told me to not mess with him! I should have listened!
SCP-4537 is shaking at a force seemingly impossible to achieve according to the laws of physics. The unidentified person is in a state of panic, searching for the radio station.
SCP-4537: That was the biggest mistake of your life, boy.
Unidentified: I'm so sorry i said that, please don't…
SCP-4537: Sorry won't do it for what you said.
SCP-4537 walks towards the blast door.
Unidentified: Oh fuck, he's coming towards the door!
SCP-4537 is seen punching a hole in the blast door, and then ripping a giant hole open for it to climb through.
Unidentified: What the fuck! How in the fuck?
SCP-4537: You messed up big time.
SCP-4537 is shown grabbing the unidentified person and swallowing him whole. SCP-4537's jaw became 70 cm wide.
SCP-4537: Time to make some people happy!
All of Site-██ was evacuated. The incident caused ███ deaths. To stop further incidents from occurring, access to the intercom needs approval from Dr. Walter Green.
Note from Dr. Walter Green: Jesus Christ, that thing is more dangerous than we thought. That blast door was 25 cm thick! No moron is allowed to agitate that thing anymore, the consequences were HUGE!. God, I'm gonna go get some coffee. It'll calm my nerves.
[END LOG]
