This behavior is definitely not uncommon. I see it everywhere where I walk. There's always someone who either looks ready to climb into a very comfortable bed or ready to shoot something with the lasers that seem to come out of their eyes. The grumpiness eventually just rubs onto everyone else, and the whole school environment is effected. I've felt very moody and tired lately because any person can affect the atmosphere of a certain place.
This is when I got to thinking - what if people did this when they grew up, too? If I became an executive director, then would my future employees do this? It's a very sad thing that I may have to deal with, and because of this, I decided to research on whether or not they actually do it currently.

This is really important to know if I ever become an executive director because knowing about how to help my employees would be extremely valuable. It would also be very crucial to know how to increase the overall productivity of my company. This could even be very useful now with students. Maybe schools should also try to meet with the students and try to negotiate with them about work and put a positive mood in the students. No one wants to work or learn in a place full of zombies! Solutions to this zombie-effect in schools and work places are very welcome and extremely urgent!