by Sunday, crowd-wise, is a lot like Friday at Fan Expo. Crowded, but you can still move around. It’s also the last day of four at the con, so the overall speed of the crowd is often a little faster since time is now very limited. But some things aren’t faster. My son and I got in line at the top of the escalator to go to the bottom of the North Building and The Walking Dead panel. The line did not move. At first, this seemed to be because the escalator was malfunctioning. Again. After a few minutes, staff made it clear that the panel had no seating left.…