IM HAPPY.gif
From Screamer Wiki
Template:Flashing lightsIM_HAPPY.gif is a fictitious animated GIF image that was first mentioned in the creepypasta The .GIF, which was originally witten and posted to the Creepypasta Wikia in 2011 by user Multiverseman. One thing to note is that aside from being a screamer, IM_HAPPY.gif also proves to be very dangerous and at the most deadly to anyone who views it, with it having very harmful effects on both viewers and their computers.
It starts off with a gif of a Yellow face smile. But then after 11 seconds, the face turns angry as its eyes turn black. The face then screams loudly then shows a very fast sideshow of various creepy photos and then text appears with flashes that say "Have a nice day" after that it flashes back to the yellow face with no eyes and blood from mouth then the gif ends with a black screen
Link
NOTE: The following content contains screamers!
- youtube.com/watch?v=_Ul159YkOoQ
- giphy.com/gifs/creepy-im-happy-PwSuC4jHyZ6KI GIF Version without sounds