Have you ever found yourself seen images right before falling asleep? You might be experiencing hypnagogia. We're conducting a survey of our viewers! If you have time, please give us feedback: www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Inerri, D.A. Noe, Charles Southerland, Fatima Iqbal, سلطان الخليفي, Nicholas Smith, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: www.theatlantic.com/science/archive/2016/04/deciphering-hypnagogia/478941/ www.scientificamerican.com/article/tetris-dreams/ www.sleepassociation.org/patients-general-public/hallucinations-during-sleep/ www.merckmanuals.com/professional/neurologic-disorders/sleep-and-wakefulness-disorders/narcolepsy www.sciencedirect.com/topics/neuroscience/hypnagogia www.ncbi.nlm.nih.gov/pubmed/8894197 www.ncbi.nlm.nih.gov/pmc/articles/PMC4173919/ www.britannica.com/topic/dream-sleep-experience#ref423110 www.ncbi.nlm.nih.gov/pubmed/24051119 books.google.com/books?id=q_vpBAAAQBAJ&pg=PA117 www.psychologytoday.com/blog/dream-factory/201502/how-dream-salvador-dali www.bbc.com/future/story/20150409-i-have-exploding-head-syndrome www.merriam-webster.com/dictionary/hypnagogic pdfs.semanticscholar.org/09d8/95b85d772fb505144969310255c0cbdc74a7.pdf www.academia.edu/33150155/Replaying_the_Game_Hypnagogic_Images_in_Normals_and_Amnesics www.businessinsider.com/what-is-a-hypnic-jerk-2014-5 www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Myoclonus-Fact-Sheet www.sleepassociation.org/patients-general-public/sleep-myoclonus/ www.bbc.com/future/story/20120522-suffer-from-sleep-shudders