I know you're tempted, but you must resist.
This video is actually terrifying. I can't believe I've been carrying one of these things in my pocket all this time! It's almost enough to make me want to give up my phone. Just kidding never never never.
As redditors will point out, when the battery is already swollen like that, it's a good sign it's about to self-destruct Get Smart-style. Not that this would have been a good decision otherwise.
If you can't get enough of things exploding that shouldn't explode, check out what happens when you over-inflate a basketball.