A dozen or so versions read that the cloud, Hid Him from their sight, which is actually more accurate. This depiction fits well into the idea of clouds hiding and moving. Drop down to verse 11, where two angels speak to the spellbound disciples:
Same is the operative word here. The two angels provide two witnesses, as it were, that Christ will come again in the same way He ascended. And, He ascended in a cloud, so He will return in a cloud. This passage gives insight into the Day of the Lord, when Christ returns.
Does it also fit other prophecies about the Day of the Lord? Turn to Matthew 24, the Olivet Prophecy: