This summer a man fell into a hot spring at Yellowstone, and melted to death.
The nameless "thermal feature" or "acidic mud pot" into which he tumbled was superheated ("the thermometer was off the charts", according to one ranger) and highly acidic. Therefore, in a matter gladdening the hearts of mad scientists everywhere,
“In a very short order, there was a significant amount of dissolving,” [Lorant Veress, a Yellowstone deputy chief ranger] told KULR.
"[T]here was a significant amount of dissolving" indeed.
Another ranger observed that "[r]ecovery efforts were terminated... because [rangers] could not locate any remains."
It's like an Edward Gorey cartoon:
"Somehow, Colin Scott slipped, and as his sister watched, the 23-year-old tumbled into one of the boiling springs. Despite her immediate call for help and the prolonged search efforts by park staff, her brother was never seen again..."