*BOOM* *click* *click* *THUD* *THUD*
Suddenly Barker was roused very quickly from his sleep as 10 tonnes of solid snow/ice fell on him from far above.
Barker, having spend the night under the southern citadel, looked straight up at the new gaping hole in the mountain citadels floor, covering his eyes with his paws as suddenly an ever increasing brightness filled the cavern, reflecting and deflecting of the varying surfaces of ice around him.