Mark 9:8
Suddenly they looked around and no longer saw anyone with them, except Jesus alone.
Luke 9:36
When the voice had ceased, Jesus was found there alone. And they kept silent, and told no one at that time any of the things which they had seen [concerning the divine manifestation].
Luke 24:31
Then their eyes were [suddenly] opened [by God] and they [clearly] recognized Him; and He vanished from their sight.
Acts 8:39-40
When they came up out of the water, the Spirit of the Lord [suddenly] took Philip [and carried him] away [to a different place]; and the eunuch no longer saw him, but he went on his way rejoicing.
Acts 10:16
This happened three times, and then immediately the object was taken up into heaven.