It cannot be found in the scriptures, but one story has it that upon his resurrection, the Lord appeared to a certain fisherman.
"I am Jesus - My death has saved all who do or will believe, and I am returned to show the Father's love and power.
"No, you're not Jesus, so bug off, you're scaring all the fish," answered the old fisherman.
"I see thou are full of doubt. What would thee have me do to show who I am?"
"Walk across the river," he tells Jesus.
So Jesus starts walking across the river. Next thing, he sinks and disappears under the water. After he swims back to shore, the old man says to him, "There you are, see, you're not Jesus, you can't walk across water"
Jesus responds, "Well, I used to be able to do it until I got these darned holes in my feet!"