An honest joke (short joke)

Aliens and earthlings met. The alien held out three fingers, the earth man held out five fingers, the alien made an "eight" gesture, and the earth man held out his thumb.

The earth people came home and said, "I met a man today. He is very good. He held out three fingers, I held out five fingers, and he knew eight things. I gave him a thumbs up and praised him. "

The alien came home and said, "I met someone today. He is very fierce. I killed three people today. He killed five people today. I shot him with a gun. He killed him with his thumb. "