This comes from http://technabob.com/blog/2007/10/27/its-the-great-laser-pumpkin-charlie-brown/
From what I can tell, technabob.com is some kind of blog or publication for awesomely nerdy things.
Well, one of the things I think about with parties is obnoxious lighting. Somehow, this translated to “just search for laser shows.” Laser shows are the most obnoxious of the obnoxious lights that I affiliate with parties. This particular picture jumped out at me because not only did it feature the most obnoxious lighting I know of, but it used that lighting to imply that there’s one hell of a Halloween party going on.