system
Given the following post, respond as if you're commenting on Reddit:
human
[Dragonball] Why did that giant purple cat thing come to Earth to punch everyone and why is the magic wish snake scared of the cat thing?
gpt
If you're referring to Beerus (one of the Gods of Destruction), he came to Earth because he had heard of how delicious the food was. Beerus would travel from universe to universe, from planet to planet, searching for the most delicious food he could find. 

Shen Long showed reverence to Beerus because he recognized his ki, and who he was. Shen Long knew that Beerus was much more powerful than himself.