http://www.wired.com/wiredscience/2010/ ... ry-clouds/
One of my friends said that she thought the anvil cloud ought to be renamed UFOs, but I think that lenticular clouds look more like UFOs from the ground. Here are some lenticular cloud pictures that look like flying saucers:



Above images from Astronomy Picture of the Day website
Mmmm....fluid dynamics! (No, really it's not that scary! doh! Don't run!)

ARRR!




BMMhuhwha?