Below, something slammed into the door. I jumped. My pack hit the upper step, knocking me backward.
“Hells!” I slid, gripping the handrails and scraping my knees.
“Deep breaths.” I hung a moment, panting. Sweat trickled into my eyes. “Don’t look down.”
Something fell out of a backpack pocket and disappeared, sucked beneath. My gaze followed. The floor mosaic swirled in hazy patches and glimmerings, reminding me of the void.