Maid Marian: Why, you speak treason.
Robin Hood: Fluently.
King Richard: My first command to you, my lord earl, is to take in marriage the hand of Lady Marian. What say you to that, Baron Of Loxley?
Robin Hood: May I obey all your commands with equal pleasure, sire!
Suggested correction: No car, just light on the hilt of Scarlett's sword.
I verified the scene. It's definitely not from the light of Scarlett's sword. It occurs after Will gets off his horse and the horse is turning. To the right of the horse is a tree in the background. To the right of that is a small clearing, about level with the horse's mouth. For a fraction of a second you can see a white object go across the small clearing in the same manner as a white car driving by.
Bishop73