Post-traumatic stress disorder had destroyed Donna Kilgore's life. Then experimental therapy with MDMA, a psychedelic drug better known as ecstasy, showed her a way out. Was it a fluke -- or the future?

THE BED IS TILTING!

Or the couch, or whatever. A futon. Slanted.

She hadn't noticed it before, but now she can't stop noticing. Like the princess and the pea.

By objective measure, the tilt is negligible, a fraction of an inch, but she can't be fooled by appearances, not with the sleep mask on. In her inner darkness, the slight tilt magnifies, and suddenly she feels as if she might slide off, and that idea makes her giggle.

"I feel really, really weird," she says. "Crooked!"

Donna Kilgore laughs, a high-pitched sound that contains both thrill and anxiety. That she feels anything at all, anything other than the weighty, oppressive numbness that has filled her for 11 years, is enough in itself to make her giddy.

"Now I feel all warm and fuzzy," she announces. "I'm not nervous anymore."