New International Version (©1984)
Peter followed him out of the prison, but he had no idea that what the angel was doing was really happening; he thought he was seeing a vision.New Living Translation (©2007)
So Peter left the cell, following the angel. But all the time he thought it was a vision. He didn't realize it was actually happening. English Standard Version (©2001)
And he went out and followed him. He did not know that what was being done by the angel was real, but thought he was seeing a vision. New American Standard Bible (©1995)
And he went out and continued to follow, and he did not know that what was being done by the angel was real, but thought he was seeing a vision. International Standard Version (©2008)
So Peter went out and began to follow him, not realizing that what was being done by the angel was real; he thought he was seeing a vision. GOD'S WORD® Translation (©1995)
Peter followed the angel out of the cell. He didn't realize that what the angel was doing was actually happening. He thought he was seeing a vision. King James Bible
And he went out, and followed him; and wist not that it was true which was done by the angel; but thought he saw a vision. American King James Version
And he went out, and followed him; and knew not that it was true which was done by the angel; but thought he saw a vision. American Standard Version
And he went out, and followed; and he knew not that it was true which was done by the angel, but thought he saw a vision. Bible in Basic English
And he went out after him; and he was not certain if what was done by the angel was a fact, for it seemed to him that he was seeing a vision. Douay-Rheims Bible
And going out, he followed him, and he knew not that it was true which was done by the angel: but thought he saw a vision. Darby Bible Translation
And going forth he followed him and did not know that what was happening by means of the angel was real, but supposed he saw a vision. English Revised Version
And he went out, and followed; and he wist not that it was true which was done by the angel, but thought he saw a vision. Webster's Bible Translation
And he went out, and followed him, and knew not that it was true which was done by the angel; but thought he saw a vision. Weymouth New Testament
So Peter went out, following him, yet could not believe that what the angel was doing was real, but supposed that he saw a vision. World English Bible
And he went out and followed him. He didn't know that what was being done by the angel was real, but thought he saw a vision. Young's Literal Translation
and having gone forth, he was following him, and he knew not that it is true that which is done through the messenger, and was thinking he saw a vision, | 
