Want to not just erase, but destroy, your hard disk?

You know the problem. Old, outdated, worthless computer. Should donate to charity, but you're afraid someone might hack your hard disk. Try erasing everything. Double erase. Multiple overwrite. Still afraid to give it away.

Destroy it. But how? Smash it, throw it in the garbage? Someone might find it.

Solution: Thermite! Thermite has VERY impressive destructive potential.

And speaking of thermite...