The Slender Man is described as very tall and thin with unnaturally long arm
The Slender Man is described as very tall and thin with unnaturally long, tentacle-like arms (or merely tentacles), which it can extend to intimidate or capture prey. It has a white, featureless head and appears to be wearing a dark suit. The Slender Man is associated with the forest and has the ability to teleport.
Imagine if today he is in Car Park Avenue, and you the only survivor.....