Normally, we would never see this happen; its just too fast for the human eye to take in. We "see" it happen, but not in high speed photography like this. However, we do know this is happening and that is what really matters. Whether something is fast or slow, is irrelevant when it comes to the eyes of faith. Here are a couple of passages that seem to work well together to show what I mean.
Acts 1:4-11 WEB (R)
(4) Being assembled together with them, he commanded them, "Don't depart from Jerusalem, but wait for the promise of the Father, which you heard from me.
(5) For John indeed baptized in water, but you will be baptized in the Holy Spirit not many days from now."
(6) Therefore, when they had come together, they asked him, "Lord, are you now restoring the kingdom to Israel?"
(7) He said to them, "It isn't for you to know times or seasons which the Father has set within his own authority.
(8) But you will receive power when the Holy Spirit has come upon you. You will be witnesses to me in Jerusalem, in all Judea and Samaria, and to the uttermost parts of the earth."
(9) When he had said these things, as they were looking, he was taken up, and a cloud received him out of their sight.
(10) While they were looking steadfastly into the sky as he went, behold, two men stood by them in white clothing,
(11) who also said, "You men of Galilee, why do you stand looking into the sky? This Jesus, who was received up from you into the sky will come back in the same way as you saw him going into the sky."
1 Thessalonians 4:13-18 WEB (R)
(13) But we don't want you to be ignorant, brothers, concerning those who have fallen asleep, so that you don't grieve like the rest, who have no hope.
(14) For if we believe that Jesus died and rose again, even so God will bring with him those who have fallen asleep in Jesus.
(15) For this we tell you by the word of the Lord, that we who are alive, who are left to the coming of the Lord, will in no way precede those who have fallen asleep.
(16) For the Lord himself will descend from heaven with a shout, with the voice of the archangel, and with God's trumpet. The dead in Christ will rise first,
(17) then we who are alive, who are left, will be caught up together with them in the clouds, to meet the Lord in the air. So we will be with the Lord forever.
(18) Therefore comfort one another with these words.
Luke tells what happened and Paul says what's going to happen; both compliment one another. The "angels" said Jesus is coming back and so did Paul. We have the Biblical witness to provide testimony and our belief in the facts to provide the confidence we call faith. Whether it happens today, tomorrow, next year or whenever; it will happen. Remember, the God of heaven views things a little differently than we do, for with HIM a thousand years is as one day and a day is as a thousand years. God does things in HIS own time, whether it be in the blink of an eye like the picture or thousands of years; Jesus will come again;it will happen...believe it!