Skyscrapers are tall

All I remember now from this dream is being on top of a very tall skyscraper. It was daytime and there were other buildings around, but it seemed very open for a big city. I was so afraid of being that high up that I was literally crawling along the skyscraper roof/terrace (that was mostly just flat beige concrete and sometimes there was a swimming pool, sometimes not). Sometimes I would just huddle and basically try to hold on to the surface of the flat roof via gravity. It really did feel like there was danger of falling, not just a fear of heights gone nuts.

There was someone else on the roof, I believe I was up there to try and talk to him (almost in a video game sense... find the next guy for the quest sorta thing). He was sitting in a beach chair sort of thing, and he was relaxing on the far side of the roof. He didn't seem worried at all.

I do believe I made it to him but the rest is fuzzy until I was going back down to the ground by taking inner stairs inside the building, most of which seemed to be hollowed out and in bad shape. There was someone else there... maybe the guy from the roof? Really not sure. Logic got so badly muddled by that point that I've forgotten the rest.

Then I woke up.