I got lost...in a book.

That moment... when you have started a new book and you're on page 67 and you check how many pages there are in the book, and you recognize with concern that there are only about 300pages left. And you start to read slower to make the book last longer...

(The book is "Breaking Trail - A Climbing Life" by Arlene Blum. You can look it up here on Amazon).