Ve esto sin reirte

Watch this without laughing (Spanish: Ve esto sin reirte) is a popular screamer video uploaded by YouTube user Sandbox HD on September 19, 2011.

The video begins with a drawn smiley face and blinking background that changes color every second. The video also has a song named The Hamsterdance Song by Hampton the Hamster playing in the background. However, after 48 seconds, a picture of Regan MacNeil from The Exorcist appears with a roar from the game Sinistar. When the roar ends, a picture of Nelson Muntz from The Simpsons appears along with his famous laugh.

Link
NOTE : The following videos contains a screamer!
 * youtube.com/watch?v=M_zc-Ohj_wg