Hard to pronounce Russian words

[kutsuwamushi.livejournal.com]

A long time ago, I came across a list of Russian words that are exceptionally hard to pronounce due to the combination of sounds. I think that some of them were "standard" examples of hard-to-pronounce words, because this was an LJ discussion and several people accidentally repeated each other.

Unfortunately, I lost the link.

But perhaps you can help me again, by pointing me to a similar list or providing hard-to-pronounce words of your own. I've tried Google, but I don't know what search terms to use and keep getting pronunciation guides.