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.

>>146
sure?.. I don't know a lot about it, and I know linux has a queue for disk operations (and that's why you need to umount, so it can flush the queue for sure), but deleting in ext3 is way too fast to write stuff with 0s, and it would be waaay more efficient to just wipe the i-node clean, which would be the sane thing to do (although then again, I haven't messed with the ext3 source), I guess writing a fuse filesystem that shreded everything deleted would be pretty enterteining (sorry about that last word, I probably mispelled it, I'm not a native english speaker)