High occupancy vehicle / carpool lanes should not be treated like the passing lane, and in most places you can move in and out (unless there is a double white line and/or signage saying otherwise). If you are going with the flow of traffic, and someone wants to pass you, you should not need to move into the passing…

The Neil Gaiman Yoshitaka Amano pairing is not really very unlikely, as they had worked together in the past with the release of The Sandman: The Dream Hunters back in 1999.