Who knows the jokes of aliens and farmers?

One day, a UFO landed in the farmer's field and an alien came down from it. They didn't understand the language, so they began to compare their hands with their feet.

F: ↑ (Compared with your finger)

Nong: ↓ (with fingers)

Foreigner: Use your fingers to compare with 3.

Nong: More than fifty.

External: Compared with thumb and forefinger (such as 7)

Farmer: The thumb and the other four fingers touch each other (pinch)

The aliens have escaped.

The farmer came home and told his wife, I met a very strange person today. He told me that food fell from the sky. I said it grows on the ground. He asked me how much I weighed 3 kilograms. I said 50 yuan, and he asked me how much I weighed 7 kilograms. I said I'd take the money first, and he left. ...

The alien returned to the planet and said to his people:

I met a terrible person today. I told him that I came from the sky, and he said that he grew from the ground. I said I killed three people, and he said she killed 50 people. I said I killed him with a gun, but he actually said he was crushed to death. I ran away in fear. ...