LOL i was thinking the same thing. the first picture made me laugh. i personally would never do such a ridiculous thing.
I think it's the wonders of Photoshop - they take a picture of the bride in the dress, then they put the dress on a manequin and set it alight - then skillfully merge the two images together. But still, this has to be one of the stupidest images ever.
Dancing in the rain however... yep, that's a different matter.