What did Peter do when the beloved disciple said, "It is the Lord!" (John 21)?

Answer: Jumped into the sea

Peter put on his outer garment, for he had removed it, and jumped into the sea.

“Then the disciple whom Jesus loved said to Peter, “It is the Lord!” As soon as Simon Peter heard that it was the Lord, he put on his outer garment (for he had removed it) and jumped into the sea.”— John 21:7 (BSB)