It’s not rocket science: We carry the ideas and impressions of things we watch on Netflix (or network TV) into the sleeping dimension. And, spoiler alert: science backs that up in a serious way: One study found that you’re 13 times more likely to have a nightmare after watching something violent, as opposed to folks who watched nothing, or kept their entertainment light. Yes, that probably means no zombies or white walkers. (Source: Men’s Health)