Massive Falling Object Hazard
I made a post 2 days ago about a hazard I wanted to create involving a massive object falling, or something similar to those Super Mario World traps where the ceiling closes down on your head and crushes you.
The issue is that if it's a truly massive object, something extremely heavy, I haven't really found rules about damage for things like that. Honestly, something like that would probably just kill you instantly anyway.
So I had an idea, and I'd like to hear your opinions about it. I was thinking of making a hazard with a periodic activation or something similar, where when the object falls onto a creature, they get a Reflex save. On a failure, success, or critical success, the creature would move out of the falling area's space through forced movement or something similar — assuming the character has enough movement speed to actually get out of the hazard's area.
For example, if a creature can't move at all, then it basically wouldn't be able to escape the hazard zone, since it physically can't move away.
Honestly, I'm pretty lost on how to handle this. I'm not a huge fan of insta-kill mechanics like this, since I can definitely see the problems with them, but at the same time, it's kind of the only way I could think of to make a hazard like this feel believable. Like I said, if something massive falls directly on someone's head, it would usually just kill them.
So I'm wondering if there are any existing PF2e hazards or mechanics that are somewhat similar and could work as a reference. This post is mostly me looking for ideas on how to make something like this work in a way that still makes sense mechanically.
In the other post I made, I used the example of something like a 3x3 marble pillar or another extremely heavy material falling.
PS: I'd love to hear your ideas on how you'd handle something like this mechanically. I'm open to any kind of suggestion or alternative approach.