Alien Wants You To Eat The Fish
You have been beamed up by some aliens and now you are in a room where there is a fish, and the alien says "I am doing my experiments on humans and I know that humans like to eat the fish so to win in the test you must prove you are a human and eat the fish! (BUT it is a nice pet fish so you do not want to eat it! So how do you win but NOT eat the fish and even have a nice pet fish in the end instead??)
Answer: You throw the fishtank at the alien, because water is poison for the aliens so it will die and you will win (and the fish is a type of fish that can live on land)
Source: https://riddles.com/9529
