Imagine going from one place where you were one of 10, knew everyone's foibles, whimsies, stress points, and patterns. Then the next day, you were thrust into a place where you are in charge of 40 people, plus you need to know the names of 40 to 50 more people, and there are all sort of short folk dashing in and out of the area, with nary a care (since they have other older, bigger, people to do that for them). From your own small office where you can close the door for private conversations, you have a shared space, with a hole in the wall for the other people to poke their heads through when necessary. Where everything is new, smells new, even the chair doesn't conform to one's butt yet.
Culture shock in my own backyard is what it is. This calls for ice cream therapy!