10 Horror Movie Characters Who Were Their Own Worst Enemy

10. Malcolm -- Identity (2003)

2003's psychological horror flick Identity treads a fine line between compelling mystery and shamelessly bonkers surrealism.

Serial killer Malcolm Rivers (Pruitt Taylor Vince) is on trial, awaiting a verdict on whether he will receive the death sentence for his crimes; meanwhile a group of ten strangers gather in a hotel, and begin being killed off one by one. But how do these narratives connect? Well, riding in on the wave of split personality films of the late '90s and early '00s (Fight Club, Primal Fear), Identity sought to take things one step further down the science-fiction chain, by having the vast majority of the film's action take place within one man's head.

All ten characters are distinct personalities of Malcolm's, and Ed (John Cusack) has been tasked with rooting out and eliminating the one murderous persona, in hopes of liberating Malcolm from their deadly designs. Unfortunately, not all goes to plan and Malcolm's evil personality, the nine-year-old Timmy (Bret Loehr), triumphs by killing all the others, assuming full control of Malcolm's psyche once and for all. And, if that's too much to wrap your head around, think how Malcolm feels!