SO glad I wasn't featured as part of this prank!
DM Pranks filmed this video in Perugia, Italy with the intent of terrifying people. Well, it worked. 
The clown is shown in a couple of different places, hidden until people walk closer. Then... well just watch the video and find out for yourself. Be warned, this video will give you NIGHTMARES!! And remember: BEWARE OF FREAKY CLOWNS!
Watch here: