Discovered at Glacier National Park...

Budweiser and/or Bud Light mixed with Clamato juice, Chelada.

It appears to be AB's translation of a traditional Mexican drink, ala beer with lime and salt. Chelada translates roughly to, "my cold beer." And it is in a tallboy can!
Couldn't resist urge to try! Opted for the Bud Light Chelada.
Transported back to motel room and experienced, very interesting.
Definitely not like a bloody mary, more like fizzy watered down Clamato juice.
Might have been a bit better with a shot or two of Tabasco, but none was at hand.

Recommendation: may accompany a breakfast burrito quite well and may suit some as "hair of the dog" for particularly rough morning afters. Other than that, you're on your own.
But then again, it is in a can...