Over the weekend, certain locations of McDonald's brought back their Szechuan sauce (which came out as a promotion for the Disney movie Mulan) after sci-fi cartoon Rick and Morty fans demanded it, based on an episode of the show. Unfortunately, things didn't go quite as planned, and most of the fans who wanted the McNuggets dipping sauce weren't able to get it. Lines were long, supply was low, and people ended up scalping packets of the sauce for as much as $700 on eBay, according to EW.