For some reason, I sometimes dream about the movement of planets on which I walk. I've had several dreams about sudden shifts in gravity as bodies move closer to each other, such as the moon drifting rapidly towards Earth.
Last night, I had another such dream, but in the context of it being a common event, of sorts. I was working my job, preparing and completing tasks, engaging with co-workers in the office, all the while being aware that a planetary collision was imminent. The planet upon which I stood was similar to Earth, even with modern North American buildings and civilization. It seemed far less populated than Earth. The planet was in a close orbit around a giant brown gas giant. Somehow, another smaller gas giant was also in a similar orbit around the same brown gas giant.
This set up a situation in which the terrestrial planet was on a path to collide with the smaller gas giant. This fact was well-known to everyone on the planet, so perhaps that's why the planet's population was sparse. Even those at work seemed sparse. We all knew about the collision. But, this fact didn't seem to faze those who remained. The evacuation was coming, but to me, it seemed like the egress should have happened already, not in the future.
At some point, I went on a drive (I don't recall the vehicle I used, but it moved very quickly and I don't remember the roads once outside the city). I saw the closeness of the smaller gas giant and realized I was already experiencing a subtle shift in gravity. There also seemed to be weather effects starting to happen. The brown gas giant filled the western sky with half the planet above the horizon. The smaller gas giant was fully visible in the northern and western sky, in front of the brown gas giant. The star was north and east.
Once I saw the weather and felt the gravitational effects, I decided it was time to leave. The dream ends with me back in the office and packing up. A co-worker came by. She asked if I was ready for the meeting that was about to start. I didn't respond. I just kept preparing to get off-world quickly.