I don't know about you, but my first thought is that it must have been Eminem.
He appeared in a highly visible (and, to some, risible) Super Bowl ad for Chrysler. He swears a lot. Perhaps they didn't pay him on time. Perhaps he's just in a bad mood.
In any case, some wise soul, employee or associate of Chrysler (or not), managed to tweet the following on Chrysler's official Twitter feed: "I find it ironic that Detroit is known as the #motorcity and yet no one here knows how to f***ing drive."
Even though the tweet has been removed, confirmation of its existence comes from the Twitter hashtag #motorcity, which shows, astoundingly, that hundreds of people have retweeted this passionate communication.
For its part, Chrysler has tweeted a wringing of the hands: "Our apologies--our account was compromised earlier today. We are taking steps to resolve it."
This is an interesting set of words. If they are taking steps to resolve it, does this mean that a Chrysler employee may, indeed, have been involved in this amusement?
Or could it be that the same deft cove who plundered his way into Ashton Kutcher's Twitter feed at last week's TED conference has struck again?
Jalopnik is reporting that the culprit is an employee of Chrysler's social media agency New Media Strategies.
Perhaps, when all is revealed, this will merely be a story that has, at its heart, one of Eminem's own songs: it must the ganja.