Rogue clouds -- are they a menace?

I hope I chose the right forum to ask this particular question. I was driving through Pennsylvania last week, on my way to Vermont, when I pulled into a truck stop to get some gas and use the bathroom.

I had been driving straight through from Iowa and after this brief rest stop one of my friends was to take the wheel.

I was exhausted and looked forward to the change of drivers.

From here on out, my friend would drive, the other friend would ride shotgun, and I could stretch out in the back seat and sleep.

As we pulled out of the rest stop and back onto the freeway I stretched my arms and yawned. I was about to tell my friend goodnight or some such thing, when I happened to look out the window.

A brilliant blue sky. Filled with those enormous, white, puffy clouds. I forget what you call them, something like "Cumulus Stratospherius" or "Puffomatic Flotacius"

But anyways, I'm staring at these huge mushroom clouds lazily floating across the azure sky, slowly drifting off to sleep, when suddenly a rogue cloud approaches the car.

I bolt upright.

Something is wrong! This is a friggin' menacing cloud. It's too close to the car and much, much too dark.

I try to tell my friends, but they have the music blaring ( Led Zepplin's "Immigrant Song") and they fail to hear me. They just continue driving down the road, their heads bobbing to the music, and my screams are carried away by the primal wailing of Robert Plant.

I look back at the rogue cloud. A face stares back. A German soldier in one of those helmets with the point on the top.

He whispers something into a microphone and then the cloud darkens and I lose sight of him.

Now, I'm sweating. And screaming.

But my friends are still unaware of the hell that is breaking loose around them and continue to drive in their drug-induced fashion.

Soon, more dark clouds appear. More German soldier faces appear. They just stick out of the cloud for a second, look around, and then dart back in.

So, this is it. We are being invaded by Germans in dark clouds. They are all around us.

Back to my science question: Is it possible for human beings to control clouds in such a manner as to hide blimps or some other sort of floating structure?

Might we be in the midst of an invasion without realizing it?

Damn it, people, I'm scared, and I'm looking for answers.

I only pray that the "Science & Mathematics" crowd at A2k can calm me down and tell me that there are no Germans in the clouds -- that my imagination has reached a crescendo not seen since the days of McCarthyism.

Is it too much to ask for help from my A2K brethren?

I anxiously await your guidance.

Gustav