Call it a "perfect cloud collapse"

This is the first time I heard the word "cloud avalanche" and the first time I saw a "cloud avalanche" on a video. Recently, a "cloud avalanche" occurred near the Kapuche Glacier Lake in the mountains of Nepal. That scene is really rare, and you are lucky enough to see it once in your life.
At that time, a group of travel enthusiasts were camping by the lake, and they took the risk to capture this rare visual feast.
The white snow clouds rush down the valley unstoppably, swallowing the mountains in an instant and rushing towards the lake. Against the blue sky and tawny mountains, they become more clear-cut, spectacular and shocking. The strong airflow overturned tents and sleeping bags, scaring fellow travellers, but fortunately there were no casualties. Afterwards, a small rainbow suddenly appeared by the lake. It was so beautiful that all the travel friends cheered and marveled. Call it a "perfect cloud collapse"