i havn't read the book, but,
with your last question, perhaps darl was imagining the event about which he narrates? Perhaps darl is an artist/writer? In what circumstance would you or I go through the descxriptive motions in such detail - perhaps he missed it, and now seeks to recreate it, in order to compensate for his absence...? just a thought, but i haven't read the book. Hope to some day.