Prologue

What sucks about a prologue is that is basically means you have write a first page two times.
If a reader picks up a book, they'll start by reading the prologue, so you need to hook them with that first page.

But if you're submitting your art to an agent or something, you don't necessarily include the prologue. You'd most likely start with chapter 1. Which means that the beginning of chapter 1 has to hook the agent.

Can you tell that I spent all last night working on the first line of chapter 1?
Well, a couple lines. But still.