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.

>>24
1. It's not farfetched. Remote storage is being used a lot more now (be it a file/media server stashed away somewhere, or a self-contained network-ready hard disk).

2. It wouldn't work, because, gee, do you think the Feds might have a little thing like A SEARCH WARRANT!? They would find it and you'd look all the more suspicious for stashing a NAS array in your attic.