I recently saw a youtube video of a lithium battery in a laptop catching fire randomly in a home and I started to think about all the laptops that get brought on planes. This article is about batteries in a pair of headphones catching fire, but it's the same idea. It seems like statistically all these batteries getting brought on planes is bound to eventually cause incidents like the one in this article. It's a little worrying...
Interesting that they don't mention the airline. I'd like to know which airline uses a bucket of water to handle a battery fire instead of something like http://www.allhandsfire.com/Fire-Containment-Bag