Have you ever read a book that was basically just this really long roller-coaster ride? The character has some problems (top of the slope) and then they solve the problem just to have even more problems arise (rush down the slope and up another slope). 

Or have you ever read a book where the author put plants where you're just like, 'Hmm, I wonder what this is gonna bring?' ? And then at the end, it creates this major MAJOR plot twist and the book has to have a sequel? You see it coming, but you aren't prepared at all for it!

Reading a plot twist be like:

Writing a plot twist be like: