system
Given the following post, respond as if you're commenting on Reddit:
human
What happens to matter at the center of a nuclear explosion?
gpt
The center of a nuclear explosion would be inside the bomb, which is basically very hot matter and very hot neutrons.  In a fusion (thermonuclear) bomb, the pressure at the center is on the order of billions of atmospheres, and everything is moving away from there at several hundred kilometers per second.  Any matter in the center is being bombarded by neutrons so energetic they will tear apart the atoms.  

Essentially, Bad Things.