Sometime if you hear or watch something that funny it can make you laugh because laughter is natural it comes from a feeling inside. If you watch movies or listen to funny songs you’ll laugh out without a pretend. Example you talk a joke with friend and then you laugh because you have an emotional and feel its joke or you talk about the funny in group that make you laugh. When you watch movies with a funny scene although it’s a little funny scene but you’ll laugh because you expect a joke from movies so you laugh.