420yolo.com
From Screamer Wiki
420yolo is, indeed, a jumpscare, containing the usual Jeff the Killer flashing with a loud yelling noise.
People have said that sometimes the site will refuse to load. This could be because the author sometimes turns it off.
People have said that this site gives out malware, or unwanted ads, by exploting the Google Chrome/Fire Fox extensions. This has been confirmed false, but on the other hand, the site may give out cookies.
This site will redirect you to a site called caketime. (caketi[dot]me)