SCP-303 and SCP-999 - Do not steal please

Description: SCP 303 (From the SCP Wiki) Witnesses describe SCP-303 as a nude, sexless, emaciated humanoid figure with reddish-brown skin. Instead of normal facial features, its head is dominated by an extremely large mouth, which bears a set of oversized human teeth. It continually vocalizes a wheezing noise, loud enough to be heard from the other side of most solid doors. All individuals who have had encounters with SCP-303 are capable of describing it in full, including individuals who have not physically seen any part of it. SCP-303 will periodically materialize behind any closed door, hatch, or other entryway barrier opposite a sentient observer, chosen by unknown means. SCP-303 will then remain behind the door for an indeterminate amount of time. Any individual attempting to open the door or barrier experiences intense, paralyzing fear that lasts until SCP-303 dematerializes (either on its own or to avoid being directly seen by another observer). The source of this fear is not clear, but appears to be similar in nature to arachnophobia and ophidiophobia, originating on a pre-conscious, genetic level. [DATA EXPUNGED] analysis indicates that SCP-303 is not, in fact, purposefully inducing fear in the affected individuals.