As for HOW the Harvest will happen, we might have a clue. Ken Powers, former partner of Yada, in "The End of the Beginning", Chapter 8, wrote this:
"The other Old Testament example of a rapture experience happened in the plain view of a reliable witness who recorded it for posterity. Apparently, what was about to happen to Elijah was no secret, either to himself or any of the other prophets of Israel, of whom there were many at this time (848 B.C.). Elijah’s servant and fellow-prophet, Elisha, determined to be there when it happened. “It came to pass, when Yahweh was about to take up Elijah into heaven by a whirlwind, that Elijah went with Elisha from Gilgal. Then Elijah said to Elisha, ‘Stay here, please, for Yahweh has sent me on to Bethel.’ But Elisha said, ‘As Yahweh lives, and as your soul lives, I will not leave you!’ So they went down to Bethel. Now the sons of the prophets who were at Bethel came out to Elisha, and said to him, ‘Do you know that Yahweh will take away your master from over you today?’ And he said, ‘Yes, I know; keep silent!...’”
Then off to Jericho. Same thing happened. “So the two of them went on. And fifty men of the sons of the prophets went and stood facing them at a distance, while the two of them stood by the Jordan. Now Elijah took his mantle, rolled it up, and struck the water; and it was divided this way and that, so that the two of them crossed over on dry ground. And so it was, when they had crossed over, that Elijah said to Elisha, ‘Ask! What may I do for you, before I am taken away from you?’ Elisha said, ‘Please let a double portion of your spirit be upon me.’ So he said, ‘You have asked a hard thing. Nevertheless, if you see me when I am taken from you, it shall be so for you; but if not, it shall not be so.’ Then it happened, as they continued on and talked, that suddenly a chariot of fire appeared with horses of fire, and separated the two of them; and Elijah went up by a whirlwind into heaven....” Note that although Elijah’s rapture was expected, it was still surprisingly sudden.
“And Elisha saw it, and he cried out, ‘My father, my father, the chariot of Israel and its horsemen!’ So he saw him no more. And he took hold of his own clothes and tore them into two pieces. He also took up the mantle of Elijah that had fallen from him, and went back and stood by the bank of the Jordan. Then he took the mantle of Elijah that had fallen from him, and struck the water, and said, ‘Where is Yahweh, the God of Elijah?’ And when he also had struck the water, it was divided this way and that; and Elisha crossed over.
“Now when the sons of the prophets who were from Jericho saw him, they said, ‘The spirit of Elijah rests on Elisha.’ And they came to meet him, and bowed to the ground before him. Then they said to him, ‘Look now, there are fifty strong men with your servants. Please let them go and search for your master, lest perhaps the Spirit of Yahweh has taken him up and cast him upon some mountain or into some valley.’ And he said, ‘You shall not send anyone.’ But when they urged him till he was ashamed, he said, ‘Send them!’ Therefore they sent fifty men, and they searched for three days but did not find him. And when they came back to him, for he had stayed in Jericho, he said to them, ‘Did I not say to you, “Do not go”?’” (II Kings 2:1-18)
If Elisha hadn’t been so determined, its possible that all we’d be able to say with certainty about his master is, “Elijah was not, for God took him.” As it is, we’ve got a detailed eyewitness account—one that’s every bit as incomprehensible as the one about Enoch if you’re not prepared to accept the power of God: “A chariot of fire appeared with horses of fire, and separated the two of them; and Elijah went up by a whirlwind into heaven.” Elijah didn’t just disappear from sight, nor did he die and leave a body behind. He rode a whirlwind into heaven. I can’t think of anyone in the Bible who made a more spectacular exit, although Korah and his merry men (Numbers 16:31-33) came close."
If the example of Eliyah is going to be the model for how those of us will be harvested when Teruah is fulfilled, it's looking more like we'll be converted to energy and disappear without a trace, with no body left behind. (Though it won't be nearly as many as Ken seems to think - a few thousand, versus millions. Also, he uses "Christian" where "Yahudym" would be correct. We here know that there won't be any adherents of Pauline doctrine included.)