Charles Spurgeon Commentary Acts 28:6

"But they expected that he would have swollen, or fallen down dead suddenly: but when they were long in expectation and beheld nothing amiss came to him, they changed their minds, and said that he was a god." — Acts 28:6 (ASV)

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.

Those who saw what had happened to him regarded it as so marvellous that they thought he must be one of their heathen deities who had come down to the earth. He was not a god, however; but he was a man of God, and God had preserved him in the hour of peril.