There was an old, widely-spread trick about a better way to retrieve important, yet hard-to-stick information in exams: switch a ring you usually wear to another finger; during the exam, when you find its place changed, you would recall the piece of information you encoded. Another way we can trick our minds and do better in exams is by implementing surprise while encoding the piece of information, as a new study by University of Manchester neuroscientists has shown. So, how could surprise facilitate learning or memory retrieval?