If you haven’t heard, the world is supposed to end in late December of this year, well at least according to the Mayan calendar. Whether or not you believe all the hype, Chevrolet has recently put an advertising spin on the uncertain pending doom, releasing a Super Bowl commercial to the public last Friday depicting the Chevy Silverado in a post-apocalyptical time.

While the commercial seems to be all in good fun and making light of the prediction, we found out from Jalopnik that one little comment made by the actors in the ad has gotten Ford up in a tizzy. Check out the commercial above and see if you can spot why Ford is not so happy and threatening legal action against its fellow Detroit giant.

Set to Barry Manilow’s song “Looks Like We Made It,” the commercial shows a ‘12 Chevy Silverado traversing through a post-apocalyptic world made up of scenarios found in previously created “end of the world” type movies. After driving through a destroyed city, under a decapitated transformer robot, past a crashed UFO and through a field complete with an erupting volcano and falling asteroids, the truck’s driver meets up with his friends, all of which own different generations of Chevy trucks.

While this is all in due fun, the commercial turns a bit iffy when the driver asks his friends where their friend Dave is. To this, one of the men answers, “Dave didn’t drive the longest-lasting, most dependable truck on the road…Dave drove a Ford.”

Obviously this has sparked some hard feelings from Ford since one of their claims to fame is producing the best selling truck in the country for 35 years. While Ford has issued a statement saying that Chevrolet’s claim on longevity is fairly legitimate, they have also expressed their dislike of Chevrolet’s insinuation that the Silverado is more durable than a Ford truck.

Because of their dislike of the commercial and what it implies, Ford issued a cease and desist letter on Saturday to General Motors demanding that the commercial not be aired during the Super Bowl, never used again, and deleted from the company’s YouTube and Facebook accounts, as well as any other internet sites. The letter stated that not doing so would result in Ford taking “appropriate steps to enforce and protect its reputation.” Ford also apparently sent a letter to NBC asking for the $7 million commercial to not be aired during the big game.

Unfortunately for Ford, GM did not comply. The commercial is still on Chevrolet’s YouTube channel and if you watched Sunday’s game, you know that the commercial aired right around half-time.

To Ford’s actions, GM Global Chief Marketing Officer Joel Ewanick released a statement to the press saying, “We stand by our claims in the commercial, that the Silverado is the most dependable, longest-lasting full-size pickup on the road. We can wait until the world ends, and if we need to, we will apologize. In the meantime, people who are really worried about the Mayan calendar coming true should buy a Silverado right away.”

In all fairness, Chevrolet did call Ford out in a flashy manner, but this shouldn’t come as a surprise to anyone. Most automotive manufactures’ claims are not only measures to brag about their company but to make other car makes look less appealing. And their commercials, well, we all know how each company downgrades their competitors in one way or another.