The space-X launch just happened and the starship went into space and the first stage separated and started to fall back to earth as the stage two went onward. As stage one was falling back to earth it exploded and the person reporting it called it a “unscheduled disassembly”. I’m like on the choice of words. I don’t have a link to the video yet, I’ll post it once it’s out, or I’m sure it’ll be easy to find later.