Almost all of the comments below this are incorrect in assuming how lever handles operate.
In cheaper or lower grade lever handles, both handles operate together and operate the latch. When it's locked, the lever stays rigid and does not move. It is very easy to stand with your own bodyweight on the lever and break it, therefore getting in.
Only in higher grade lever handles do both handles operate independently while also not engaging the latch, preventing the handle from staying rigid and less likely of being broken.
So assuming this is a shitty or lower grade lever handle, getting locked into your apt this way is 100% plausible.
To be fair, the lever handles on my apartment door do not lift up and both handles turn at the same time. For whatever reason :/ so there is reasonable chance this post is real.
Not all. The safety doors for roof access at our building only work in one direction, up. I've been told you can set any of them up to only work in one direction. Just like some can not be unlocked and require to key to open every time. Same doorknob different setup. But I agree that picture is from the inside.
The outside of those kind of doors pretty much universally, operate from the outside with a key. There may be some edge cases I'm not thinking about but they wouldn't apply to a living space.
I'm 99% sure this is fake or that it wasn't UPS who delivered the package. I can see virtually the whole box in this image and it's clear that the package is in pretty decent condition and not covered in mystery stains.
Deadbolt locking mechanism is in the picture. This looks like it was taken from the interior not exterior. Especially with the door being a push to open.
Looks like a reader or keypad above. Many of the electronic locks look like this, you can put the key in or electronically unlock and turn from the outside. My in-laws have a similar one, if you don't enter the code that part just spins.
This is how mine works. You have the deadbolt lever on both sides, and can spin the exterior one to lock after you scan your key fob. Mine doesn't have a master lock on it though; I got locked out once and they had a special electronics team dedicated to the system show up in like 15 mins and open the door through their computers