How to explode a hard drive

I know this isn't strictly tech, but I felt it's the best place for it.

People talk (on 4chan and such places) of raids by the police on their house to recover hard drives due to suspicions of CP or of pirated content.
I was wondering if anyone knew of a case where someone actually managed to destroy their Hard Drive, either remotley or before anyone could get to it, or any stories of the sort.
Could it hypothetically be fitted with some sort of... remote water filling thing?
Post anything relevant please.

>>165
Having a USB token lying around kind of ruins the plausible deniability bit.

>>166
Because they'll always give advance warning, amirite? You can microwave a drive when men in black suits are knocking at your door (make sure they aren't Jehova's witnesses), but you can't drive to your friend's house and leave the drive there.
Much better to just use encryption (and possibly steganography, though a US judge recently ruled people can't be forced to hand over their encryption keys) and safe deletion practices, like shred.