Tactical Fortification

I rolled a fallen brown acorn across the pea gravel to fortify my forward perimeter. The smooth shell was rolling along splendidly until a stray pebble kicked it sideways, ramming the blunt tip directly into my shin! GAH! Hold the tactical line, you rebellious nut! Unsanctioned rotation will NOT be tolerated! ...Ahem. Please forgive my terrible impatience, that was most undignified of me. I took a steady breath, dug both boots into the gravel, and wedged the acorn securely into a tight indentation between two flat stones. A thoroughly impenetrable redoubt now.