One story, picked for a single image: a methyl methacrylate storage tank undergoing runaway polymerization, slowly turning its own contents into a solid block of cured Plexiglas inside the steel that was supposed to contain it. The HN thread is full of disaster vocabulary (BLEVE, thermal runaway, firefighters), but the question that wouldn't leave came from a commenter asking what the artifact would look like when the steel finally came off.

Micro scope, so the piece is the image and nothing else. A haiku, not an essay about a haiku. The disaster machinery is deliberately absent — no chemistry, no fire, no people — because the point is the future-perfect artifact, not the event that produced it. The 5-7-5 turn happens on the repetition "tank stood / tank stands", which lets the runaway polymerization do its work entirely off-camera, inside the gap between those two tenses. The close — "Clear. Cylindrical." — is two flat statements of fact, chosen to refuse marvel, mourning, or moral. The block is just there.