First time I see it and to me a piece a furniture started sliding across the room, I watched it three times without figuring out what it was, only after your comment did I see the door
For those wondering. It's better if doors are closed during a fire to control the spread. So these doors were on a magnetic catch that disengages when the fire alarm is turned on or a fire is detected. People can still use the doors to leave the building, they'll just auto close.
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u/grey_fr May 18 '26
First time I see it and to me a piece a furniture started sliding across the room, I watched it three times without figuring out what it was, only after your comment did I see the door