The hallway Where light Drained away

"I was in a hallway, or I think it was, and the light just sort of drained out, not like a switch, more like a slow fade, and then nothing. I waited for my eyes to adjust and they never did. I waved a hand right in front of my face and saw nothing, felt only the air move. I kept walking anyway, one hand on the wall, which changed texture every few steps, rough then smooth then something almost damp. called out for someone and heard a voice answer from somewhere that kept shifting, left, then behind me, never where I turned. I tried rubbing my eyes like that would help, pressing hard until I saw colors that weren't really there, and then those faded too. My chest got tight, that panic building slow and steady, every sound suddenly too loud, too close. Someone grabbed my arm, a stranger maybe, and I couldn't tell if they were helping or not. I woke up with my eyes squeezed shut, took a second before I trusted them to open."