First Step on Solid Ground

I lay on the tan studded plate, flat on my back. Then, something clicked. My right arm lifted on its own. I rolled onto my side and pushed up. The wooden surface beneath the studs was smooth and cool. Slowly, I reached forward and gripped the edge of a gray plastic frame resting right in front of me. Solid. Secure. I stood upright on two boots, paused, and surveyed the perimeter across the gray field.