Object 4 - "The Slappers"

Object 4, commonly known by various nicknames such as "The Slappers", "The Smackers", "The Booty Slappers", and other nicknames, are mechanical arms that can be seen placed on the floor, or mounted on the wall. It is unknown who or what made them. They have large mechanical hands that will attempt to slap each other on the bottom. The Slappers aren't that dangerous, as a majority of people report a very slight pain where they were slapped, similar to someone slapping someone's bottom. Their different mechanical parts are either the same color or a variety of colors. There have been no fatalities with anyone coming into contact with the Slappers.

There is a 50% chance they will turn on an attempt to sap someone on the butt. The other 50% Chance is that they will just remain still. They will not extend their arms to slap someone. There have been some instances where people have not gotten slapped on the bottom, but on the face, head, or other parts of the body. There have been some instances that Slappers have slapped someone so hard they flew in the air and landed a few meters away, but they are mysteriously uninjured. It has also been observed that Slappers do not like hostile entities, as they will slap any hostile entity it comes into contact with. It is theorized the Slappers have sensors that can sense when a human passes by, and when a hostile entity passes by.

Another theory is that the Slappers are programmed to just annoy humans, but programmed to attack and possibly kill hostile entities. The Slappers have also been witnessed to help or save survivors from entities, for example, pushing them (But not making survivors lose their balance) away from hostile entities, giving them a little boost and will attack and block hostile entities.