The hot afternoon brought a sinister cloud extending across the western horizon that painted the sky behind it dark. From the distance of our heroes on Earth they could not estimate its speed, but they knew it would be upon them at any moment.
“That is the largest alien vessel I have ever seen! It covers the sky.”
“It’s a storm cloud. We need to reach shelter before the downpour.”
“It’s part of the rebellion to liberate the universe from the evil empire. They want our planet as a base of operations.”
“I hope not.”
Then the aliens landed.