A joke about an alien attacking the earth.

One day, an alien met an earthman. The alien stretched out three fingers. The earth people wanted to think, stretched out five fingers. The alien held out two fingers and gestured like a gun. The earth people held up their thumbs, and the aliens immediately ran away.

People on earth think like this: aliens stretch out three fingers to test aliens, so they are tested 3+5=? The alien is very smart, and the "say" is 8, so the earth people give a thumbs-up to show encouragement.

When the alien came back, he told his companion: I said I killed three people, he said he killed five people, I said I wanted to kill him, he said, he said he killed him with his thumb.