Why does High Horse feel sick?

Please provide more context! "High Horse" is a phrase that describes someone who is arrogant or superior, but it doesn't refer to a specific character or being.

To answer your question, I need to know:

* Who is "High Horse"? Is it a character from a book, movie, or game?

* What kind of sickness are we talking about? Is it a physical illness, emotional distress, or something else?

Once you provide this information, I can help you understand why "High Horse" might be feeling sick.