I would likely to drop more similar photos but I'm lazy. I thought it would be interesting to add Mary in a different famous places such as Squid Game, Bendy, etc.
I realised that behind Clark there's a cord that goes toward the cardboard in the camera room. so it means that the shadow we see it's might from someone from Async who saw Clark in the complex and decided to see them personally. Probably their shadows scares Clark and that's why we see him later searching for an entrance back to his store so crazily along the wall. the entrance is probably on the left side of the camera cuz the almost entire right wall is bare and the wall panel hiding the backpack and crawl space is completely wood with no chevron on it. although the shadow is coming from the right of crawl space and if I'm right about these crawlspace being placed from the left of the camera the shadow is coming from the door we see in this room on the right of the camera's perspective, so it could mean someone came to look for Clark after they saw him on the camera.
in the first teaser and the last one(where the entity) there was a clicking sound of the clock. what do you think they symbolize? the reverse timing to the movie release? something else? or it's just for the trailers's ambience and we gonna not hear it in the movie?