Final answer:
Without additional context from the literature or narrative in question, what Stanley discovers about Zigzag is unclear from the provided excerpts.
Step-by-step explanation:
The character Stanley discovers something significant about the character referred to as Zigzag. However, based on the provided excerpts, it's ambiguous what Stanley specifically finds out about Zigzag as the texts seem unrelated to each other or to a character named Zigzag.
It's important to consider the context in which Stanley's discovery about Zigzag happens within a larger narrative or text. If it's drawn from a piece of literature such as a novel named 'Holes' by Louis Sachar, then the context would be that Stanley finds out that Zigzag is not his real name, and the character's actual name is Ricky.
Zigzag got his nickname due to his curly hair. However, the provided information does not clearly state the connection, and without additional context, the exact nature of Stanley's discovery about Zigzag remains undefined.