While I'm not 100% certain it's not just confusing perspective, it does appear that the slope rise is shorter than the run, suggesting that this is from the top of the stairs.

does the trim look weird to anyone else

Thought something was weird here. The contrast and colour is making it difficult. If you turn up shadows it changes the entire feeling, including where the obvious light source is. I wouldn't expect the dark side of the mattress unless there was a bright light directly above it.

Also the banister/handrail arm wouldn't be horizontal. Most importantly, congrats, you got me invested.

The biggest factor IMO is something no one mentioned yet: we can only see one face of each step (either the top or the wall). If a photo is taken from the bottom, we would almost always be able to see the tops of the first few steps, which isn't visible here. If a photo is taken from the top, the walls would pretty much never be visible (if they were, you could also see the photographer's feet).

Therefore, this photo is only consistent with a photo taken from the top.

It is possible that this is an extremely long flight of stairs or that the photo was taken from a deliberately deceptive angle, but if that's the case I have to say it was expertly done, because I am CERTAIN that we are looking from the top and the mattress is at the bottom.

We could be looking at the stairs from underneath.

I’m a stairs half full kinda person

Based on lack of shadow, bottom.

Bottom, we can see dust and debris accumulated on the "run" part of the steps.

Middle, obviously

Trick question. It is actually stuck halfway along the entire staircase; the stairs go further on behind the mattress. 😤

The metal bar on the top left indicates it's at the top.

Reading the threads on this post of people convinced the mattress is at the top of the stairs makes me understand why people can't recognize AI generated fake images and fall for propaganda so easily.

It's clearly at the bottom of a stairwell, but the amount of people convinced it's not really bothers me for some reason, enough to feel extremely apathetic of other people on the internet and assures me most people in real life lack sense to put trust in society eventually being healthy again, and I can't elaborate further why because I don't understand why.

Bottom.

1. The risers on the stairs are not visible.

2. The wear on the carpet goes right to the edge. That's consistent with people stepping on it, not kicking it on the way up.

3. If it's at the top, the mattress doesn't appear to have any of its weight resting on a step. It could be so wedged in that it's being held in place, and that it was wedged that way by someone awkwardly pushing at the ends of it in a way that wouldn't seem to give them enough leverage to do that. But the obvious explanation is more likely, that it's at the bottom of the stairs.