First and for most, no one got hurt.
Anyone else see this special showing of Fantasmic!? I'm sure someone will post pictures soon enough, but what a show! Even more impressive now, too bad I think it was a one time only thing...
Here's a link to DAPs Magic with a picture by Britt (honorary Cast Member): Mark Twain On Fire
The Rivers of America didn't catch fire during the part with Maleificent, though ended up taking during the Mark Twain passing... neat-o!