I've read a couple of books recently which assert that one's protagonist should be shown in his normal, everyday life BEFORE the inciting incident. This is to empower the reader to understand and sympathize with one's protagonist. Maybe there's some merit to that. However, I don't understand how to apply it in my current WIP. My story begins with an amnesiac older boy, the protagonist, waking up from a coma. His normal life exists before he enters the coma. No one knows who he is and no family claim him. He apparently survives a plane crash. Much later in the plot, the reader discovers that the boy is a space alien and his UFO crashed into a plane. How can I squeeze his normal life into the first fifty pages?