WITHIN by Joshua Scribner is a flash fiction piece about a hypnosis session. Even though the story is being told through the patient's observation about her past self, I felt her terror as she begged to be allowed to leave. Even though she obviously survived the traumatic event, the suspense building up during her childhood memory is absolutely nerve-wracking. The final confrontation is extremely creepy.
This is a perfect example of Scribner's talent for turning little details into big nightmares.