File under: Aliens with cloaking devices that suck

They must have spent a mint on this technology.
Nothing to see here its just a freaking rectangle cloud
And this one I can just here the captain yelling "Damnit I said cloud not furry catapiller!"
Talk about scary. Like the pillsberry dough boy from Ghostbusters is about to emerge! They are what is apparently known as Mammatus clouds, they form after tornados apparently. So scary not scary.()
"Everybody get back inside, those eggs are bout to HATCH.