Mark 6:48 When Jesus saw that they were straining against the oars against an adverse wind, he came towards them early in the morning, ...

... walking on the sea.

What on earth did the disciples think? The Scripture says that at first they thought it was a ghost, then they knew that it was the Lord. On the water. They were another step further along in the process of recognizing the Lord Jesus for who he was. He was like nothing they had ever seen before. Same for us.