Ok so here’s something I’ve been thinking about all day
Something something “Gaster fell into his own creation” is one of the only things we know
You can speculate on what became of him or which creation it was, it’s hinted at being the Core
But like
What about what we know- he fell. I’ve always interpreted Sans’ gaster blasters as being inherited from Gaster when his magical make-up dispersed across space. Implying to me that Sans was present at the accident
But Sans has gravity powers. Really strong ones. And most commonly used to make people fall down. And he didn’t save Gaster with those powers?? Gaster, the scientist so good it took a ‘very long time’ for Asgore to replace him? How would such a brilliant person just ‘fall’ into their own machine??