10 More Best Horror Movie Villains Who Only Appeared Once

10. The Wheezing Demon - Insidious: Chapter 3

If you're looking for a movie franchise that is chock-a-block with creepy demons, then you'd be right on the money with Insidious.

The series, created by Leigh Whannell and James Wan, features plenty of horrible entities, like the Lipstick-Face Demon, The Bride In Black, and the Key Demon. But it's the underrated villain of Insidious: Chapter 3 who gets a spot here.

This demonic entity, known as both the Wheezing Demon and The Man Who Can't Breathe, is a malevolent spirit from The Further, and, boy, is he one hell of a creepy guy.

If you hear the sound of wheezing, then you should be afraid as it means this demon is near. He possesses the bodies of his victims and tries to make them take their lives so he can keep them in The Further forever, to suffer alongside him. Yikes!

The character is a clear metaphor for disease, death, and suffering, which (obviously) makes him unbelievably creepy. His design reflects this, as it is eerily human and emits a feeling of pain and sickness.

Although this villain only appeared in one Insidious movie, he still ranks as one of the franchise's scariest big bads.