You go to two movie nights. The first movie is super funny from the start to the end. You laugh the whole time, even during the long finale. The second movie is the same length, but the start is okay, and it has a fantastic ending that makes you laugh a ton. When asked which one you liked more, you pick the second-even though both were the same length and had the same total fun. Then ... more enjoyable, even though the long one was sweeter overall. What's happening with our memories of time-and how can you notice when it's tricking you? Take the quiz to find out what's really going on here.