Exploding Laptop Batteries

Even cell phone batteries still cause fires from time to time, although it's not nearly the problem it was a few years back. For really impressive results though, you need to be flying an RC aircraft you just spent weeks building, and have it vent on you a couple minutes into it's third flight. It's impressive and exciting to watch, but at the same time you can't help but think about how much time and money just went into that little fireworks display.