I was running for my train. After entering in the station airlock, for a reason i still can’t explain, i turned right instead of continuing straight ahead and BAM, i hit a glass with my face. Now i have a little scar, fortunately hidden behind my eyebrow.
It’s the small room you find at the front of stores that has one set of doors to the exterior and one set of doors to the interior. It helps prevent the warm/cold air from getting in.
A vestibule