I’ve had nightmares like that :/
I worked on black liquor boilers for a few years. They made a liquid, red hot “smelt” that flowed from the boiler into a quench tank at the bottom. That stuff always scared me. It got hit with a high pressure steam jet to break it up into small bits before it hit the water in the tank, but sometimes the chemistry of the process would get out of whack and the stuff flowed like thick, sticky lava. Then those gooey blobs would hit the water and explode BOOM!
Things that you remember but you’d rather forget!