Whilst stretching to reach the chart holder, the pilot's spurs caught the clasp of the gun case which spilled open. As the gun fell out, the first officers trusty steed, which was teathered to the jump seat, stretched his aching hooves. The gun caught Silver's front right hoof and was launched against the Captains seat back where the weapon discharged, scaring the bejesus out of all on the flightdeck. Silver left a horse shaped hole in the flightdeck door as it bolted to the aft Lav, taking the jumpseat assembly with him.