The Winchester brothers broke into the abandoned warehouse, hoping they where in time to prevent those 3 idiots from summoning a demon, but it seemed they had arrived too late. Seemed being the operative word. According to all lore on the matter, right now there should be a demon there, instead what's they got was a faintly pulsating light (eerily reminiscent of the tone you get when the person you are calling isn't avaiable), sono followed by a bored voice with a british accent -You have reached the voicemail of Anthony J. Crowley, the Serpent of Eden, he who instigated the original sin. The person you are summoning is currently unavaiable. If you have reached the wrong demon, please use a more specific circle or ritual. If you were trying to reach Azazel, the Demon With Yellow Eyes, specify his name next time, don't go by physical description, as yellow eyes aren't that rare. If you were trying to summon Crowley, the King of the Crossroads, then you have ben using the wrong ritual, dumbass, read up on crossroad demons, this is the wrong ritual, I'm in PR, not Sales, as such I'm not really interested in being summoned, so don't bother trying again, I have better to do and won't come anyway-.
With that the faint light disappeared, and the Winchesters took the opportunity to take care of the (failed) demon summoners.
-So, what was it?- -Some idiots preparing to summon a demon, probably a powerful one- -You were able to stop them in time?- -Not really, but it didn't matter, they just got voicemail-