I have a chapter in the novel I'm writing set in Hiroshima the day of the bombing. One of the aftermaths of the bombing was fire tornadoes. I didn't know how to describe them (and had envisioned a whirling cone of flames). Seeing video posted of this (it never occurred to me that I'd ever be able to see video of fire tornadoes) is really helpful in adding detail to that chapter of the book.
