It began as a strange and unnatural occurrence, like one of those unverified online photos of a chimp hanging out with a bird. Now it's threatening to become a bizarre tradition, or, as the kids so eloquently put it, ''a thing.''
Every four years or so, the Vikings should steal one of the Packers' best offensive players, just to create the kind of sideshow that can make even training camp interesting.
In 2009, and 2010, and into 2011, Brett Favre turned the already fascinating Vikings-Packers rivalry into something it had never before been on any meaningful level: incestuous.
In 2013, Greg Jennings is one-upping Favre, not in terms of existential angst and passive aggressiveness, but with new-age, self-aware, YouTube-able, Twitter-ready, Facebook-enflaming, border-crossing Scud missiles designed to invoke an emotional response even if they miss the target.
Jennings, the new Viking and former Packer receiver, is, as the kids say, ''trolling'' his former team. If you're too young to know what ''trolling" is, just listen to Jennings a few times, and you'll get the idea.
In July, in an interview with the Star Tribune's Dan Wiederer, he poked holes in the flawless image of Packers quarterback Aaron Rodgers, raising or confirming questions about Rodgers' ego and leadership skills.
This week, Jennings told KFAN that the Packers had ''brainwashed'' him into believing that Green Bay was the land of milk and honey-flavored cheddar, that operations such as the Vikings were inherently flawed.
If true, that's fascinating. If not, Jennings is fascinating.