Friction Test

Joints locked. Surface cold. I applied downward pressure through my wrists to measure leverage against the tile seam. My fingers bent slightly, then gripped. A small dark speck rested two inches ahead. I reached out with a single gloved index finger and nudged it. It shifted precisely half a millimeter across the grime. Weight, friction, independent motor function: confirmed. I pulled my knees under my frame and steadied my posture.