KJV: And suddenly there was a great earthquake, so that the foundations of the prison were shaken: and immediately all the doors were opened, and every one's bands were loosed.
NASB: and suddenly there came a great earthquake, so that the foundations of the prison house were shaken; and immediately all the doors were opened and everyone's chains were unfastened.
KJV: Howbeit they looked when he should have swollen, or fallen down dead suddenly: but after they had looked a great while, and saw no harm come to him, they changed their minds, and said that he was a god.
NASB: But they were expecting that he was about to swell up or suddenly fall down dead. But after they had waited a long time and had seen nothing unusual happen to him, they changed their minds and began to say that he was a god.