Lithop & Silver Torch Cactus as one of 12 bizarre real plants that look like sci-fi alien monsters

I've read the website about the weird plants that look like monsters. Lithop and Silver Torch Cactus are one of them even though I think Lithop is really a cute succulent (which is not easy to grow.)
 
In the article, you will find more plants which really look horrible and like monsters or alien.

Link : http://blastr.com/2011/08/12-bizarre-real-life-plan.php