Culvert Echo Target Practice

The midday glare was getting boring on the open beach, so I strutted over to a massive rusted pipe jutting out of the embankment. Total subterranean fortress potential! I aimed my gun arm straight into the dark hollow tube and clattered a loose pebble inside. The sharp CLANG bounced off the corrugated steel, echoing ten times louder, like a real blast! Obviously, nobody else could orchestrate acoustic intimidation this flawless. I perched right at the corrugated rim, sweeping my blaster back and forth across the damp shadows, fully on guard in case any lesser beings try to contest my new sniper bunker.