О9

1. Also: СВАЛИТЬСЯ (УПАСТЬ) С ОБЛАКОВ coll (often past after как, будто, словно, точно) to appear, arrive very suddenly

X как с облаков свалился - X appeared out of the blue (out of nowhere, out of thin air)

2. ( usu. infin with пора, нужно etc) to stop being out of touch with reality and start to live, think, look upon a situation etc realistically, practically: пора X-y спуститься с облаков = itis time for X to come down to earth (to get his head out of the clouds).