Again Jesus began to teach by the lake. The crowd that gathered around him was so large that he got into a boat and sat in it out on the lake, while all the people were along the shore at the water’s edge.
Didn't we just have this? Yes, exactly the same thing happens again! I think this might be one of those bits where there was a famous story about how Jesus had to preach from a boat (possibly even related to the later walking-on-water anecdote), and became attached to several different parables, which then were incorporated in the gospels.
Of course, Jesus may well have preached from a boat multiple times, but surely the second or third time, he wouldn't have been caught unprepared? :)