A Rigid Stroll

My joints clicked into motion with a sudden jolt. Trapped inside this tight, plastic shell, I tried to yell, but only a dull, muffled grumble slipped out. I forced my stubby right arm upward and scraped my curved hand against the sturdy wooden panel right behind me. A sharp tap resonated through the timber. I can actually move on my own now, even if every inch feels stiff and confined.