Don't Breathe's big reveal unfolds in two parts. The first comes over halfway into the movie, when the film's teenage antiheroes Rocky (Evil Dead's Jane Levy) and Alex (Goosebumps' Dylan Minnette) discover that the blind man (a very buff and grizzled Stephen Lang) keeps a young woman locked in a terrifying harness in his basement. Thanks to a conveniently available newspaper clipping, Rocky and Alex also learn that the bound-and-gagged woman killed the blind man's daughter in a drunk-driving accident, and he's keeping her there as a form of punishment. They quickly free her.
While the teenagers and the new girl attempt to escape the basement, the blind man -- he's actually referred to as "the blind man" in the credits -- accidentally shoots his former prisoner. As she bleeds out on the floor, he cradles her in his arms and cries. Why is he so heartbroken that his daughter's killer is dead? What's going on with this guy?
The second reveal arrives a few scenes later, after the blind man seemingly kills Alex with a pair of garden shears and captures Rocky, placing her in the same harness he was keeping his daughter's killer in. During this scene, we finally figure out why the blind man has been working so hard to rid his house of these home invaders. "She was pregnant with my baby," says the blind man, referring to his old prisoner. "You killed them both."
That's not even the most fucked-up part! As Rocky struggles in the harness, screaming for help, we watch the blind man cut an opening in her pants with a large pair of scissors and approach her with a turkey baster. His disgusting plan becomes clear: with his daughter's killer dead, he's now going to impregnate Rocky to "replace" his dead daughter. He even has a deranged justification for his actions: "There's nothing a man can't do once he accepts the fact that there's no God."
Luckily, before he can insert the baster, he's attacked by a mallet-wielding Alex, who was actually alive the whole time. (In one of the film's slightly confusing twists, he tricked the blind man into thinking he killed him with the garden shears.) After Alex restrains the blind man, he frees Rocky from the harness. Shaking with rage, Rocky plunges the baster right into the blind man's mouth and squeezes tight. It's even grosser watching it.
The audience I saw the movie with went nuts at this part. There were screams. There were gasps. There were even some horrified laughs. As Jezebel's Rich Juzwiak points out, the moment probably owes more to subversive movie king John Waters (Pink Flamingos) than modern scary movies like Paranormal Activity, Insidious, or The Conjuring. Rocky, a classic "final girl" in the horror-movie tradition, turns her evil attacker's phallic weapon against him, and provides the movie with its most cathartic (and gag-inducing) scene.