If you fly in or out of Atlanta you will be familiar with the "Plane Train", an automate people mover that moves you from where you are to the terminal you want to be at. It's fast and efficient but the doors don't stay open too long so you have to be ready to go when it stops.
My wife and I were connecting to the final leg of our trans Atlantic return trip and we were feeling the effects of almost 24 hours without sleep. We jumped on the Plane Train to get from the international terminal and go all the way to the other end. At some point a young man got on the train and started talking on his mobile phone. He was parked directly in front of the doors but we didn't give it a thought as most people will check for departing passengers and move out of the way. We arrived at our station and stood up to jockey for position at the door. He was so intent on his conversation that he didn't even look up to see if someone wanted to pass. My wife politely said "excuse me" but he still didn't move. At this point, I used my "command voice" and called out MOVE! He looked up in shock and whimpered, "You didn't have to yell at me."
The walking dead are among us.......they all have mobile phones attached to their skulls.