Mind-locked regret event causes you to focus back on the bad event again, and again, sometimes for years. Upon death, you curl back into your space-time envelope YOU CREATED to serve as your conscience for your still embodied self.

In this realm all are space travellers impacted by time you can do nothing about.

After you die, all are time dwellers inside the space you cannot change, that you created.

The deep regrets are time trap sinks for your time dwelling spirit that you may not be able to escape that looping.

Normally your conscience (you after you've died and curled back into your space-time lifespan) is trying to guide you to attain the installation of the [escape] Door so you're not stuck inside your envelope for all eternity.

BTW, all lifespan envelopes flood along the path of time down and inward, from everywhere, towards the ONE infinitesimal Singularity. This is why it's called the underworld. It's down and under closer to the infinitesimal Singularity than our current reality is. All flood down and inward into the underworld (space-time).

More to it all but this is enough for now.