What is an example of situational irony in the excerpt?

Situational irony:

"The situation of irony in which the actions done by a person brings unexpected and more over brings the opposite results to the person."

Explanation:

Example:

If a kid has the daily routine to wake up in the morning and dress up to go to school. And one day he wakes up and wears his school uniform, after which he finds out that today is off or its Sunday. So, that situation is characterized as situational irony in general.

Which excerpt are you talking about?