ALIEN IN WINDOW - SCARY
From Screamer Wiki
ALIEN IN WINDOW - SCARY is a screamer video uploaded to YouTube by the user John Gait on May 31, 2008.
Video
The video begins with a shot of the user's window at night to film a possible alien encounter. However, after four seconds into the video, a picture of an alien zooms out from the bottom left and roars before vanishing from sight.
John Gait also released a more comical version the next month that's Coca-Cola themed. The footage is altered to include three cans of Coke on the windowsill, and at the five second mark, the alien appears by knocking the cans out of its way before roaring at the viewer.
Link
NOTE: Both of these videos contain screamers
youtube.com/watch?v=VQ9koZVI4C0 - Original version
youtube.com/watch?v=yqQzMSyT-Bc - Coca-Cola version