I don't know how to do spoiler tags.... Don't read if you haven't completed episode 3!
So I knew already that if you choose not to do anything on the train, that Kenny will keep going, and you will be able to see Duck as a walker... But I recently read on the Wiki that if you take too long to shoot Duck at the tree, you will also see him reanimate then.
Has anybody experienced this? Any proof? I would love to see a video!