Many people thought the passages in the Bible that describe Jesus coming on the clouds means that Jesus would literally be coming on the clouds in the sky one of these days. But this is only a figurative speech or expression in Jewish apocalyptic language and culture. The following post explains:
This is apocalyptic language, along with “stars falling from the sky and the heavens rolling up like a scroll.” It is figurative for powers and governments falling. The Old Testament uses this language a lot:
In 725 BC, Isaiah prophesied about Edom’s destruction:
“All the stars of the heavens will be dissolved and the sky rolled up like a scroll; all the starry host will fall like withered leaves from the vine, like shriveled figs from the fig tree. My sword has drunk its fill in the heavens; see, it descends in judgment on Edom, the people I have totally destroyed.” (Isa 34:4-5)
in 586 BC, Ezekiel prophesied against Egypt:
“When I snuff you out, I will cover the heavens and darken their stars; I will cover the sun with a cloud, and the moon will not give its light. All the shining lights in the heavens I will darken over you; I will bring darkness over your land, declares the Sovereign LORD. I will trouble the hearts of many peoples when I bring about your destruction among the nations, among lands you have not known… for this is what the Sovereign LORD says: “‘The sword of the king of Babylon will come against you… When I make Egypt desolate and strip the land of everything in it, when I strike down all who live there, then they will know that I am the LORD.’ (Ezek 32:7-15)
“Coming on clouds” is figurative for God’s majesty and judgment:
“There is no one like the God of Jeshurun, who rides on the heavens to help you and on the clouds in his majesty. The eternal God is your refuge, and underneath are the everlasting arms. He will drive out your enemy before you, saying, ‘Destroy him!’
“the Name of the LORD comes from afar, with burning anger and dense clouds of smoke; his lips are full of wrath, and his tongue is a consuming fire. His breath is like a rushing torrent, rising up to the neck. He shakes the nations in the sieve of destruction; he places in the jaws of the peoples a bit that leads them astray.”
Many people take this figurative speech literally 2000 years later, just as 2000 years from now people may take literally some of our figurative speech.
So comparing Scripture with Scripture, we can conclude that your question is not a literal happening, but a description of God’s judgment on Jerusalem (in AD70) as Revelation and other prophetic letters declared. This was the city that stoned God’s prophets and crucified their Messiah.
(Source: Yahoo Answers)