This video is no laughing matter. We've uncovered some rare cases of a "laughing disease" that is contagious and can spread from town to town, but what is really the cause of the laughing disorder? In today's weird video we're going to look at hysteria and some other factors that can lead people to laugh uncontrollably and end up with some serious health problems. Watch my SCP Explained - Story & Animation channel: https://www.youtube.com/channel/UC8JfkMtNAp44vmzdtnL4wow ???? SUBSCRIBE TO THE INFOGRAPHICS SHOW ► https://www.youtube.com/c/theinfographicsshowOFFICIAL?sub_confirmation=1 ???? MY SOCIAL PAGES DISCORD ►https://discord.gg/theinfographicsshow Facebook ► https://www.facebook.com/TheInfographicsShow Twitter ► https://twitter.com/TheInfoShow ???? SUGGEST A TOPIC https://www.theinfographicsshow.com ???? SOURCES: https://pastebin.com/42vdGu0r All videos are based on publicly available information unless otherwise noted.