Super-faded

Super-faded out of my mind, she whispered, as she sank back through the couch. Not into, she noted with some surprise, but right the hell on through. "What the hell?" Paul said., staring at her. Not just...the drugs, then. Paul was the sitter, the sober person there to make sure that nothing too truly fucked-up would happen. She felt she could fade right through the walls, and that was thought enough to make her put her hand out and watch it sink into the plaster. It didn't feel like air, it felt like plaster, but somehow it just all squeezed together and let her hand pass into it. "What is this stuff?" she managed to say, distantly. Some part of her brain was--

Inspiration: "Heaven Beside You" - Alice in Chains
Story Potential: High.
Notes: What is it? Why, a government experiment to produce superpowered humans, of course!