“Come,” He said. Then Peter got down out of the boat, walked on the water and came toward Jesus. But when he saw the wind, he was afraid and, beginning to sink, cried out, “Lord, save me!” – Matthew 14:29-30 (NIV)
I have read this story. It was pretty incredible. Basically shows that people are capable of doing far more by faith and soul then they give themselves credit for. Without the belief and assumption that this is true, people instead limit their own possibilities.
It also reveals a lot about Paul himself. Paul always seemed to be a man of action. Going out and physically acting on his belief without much hesitation. And when he purposed his being to reaching Christ, he managed to walk on water.