So. Connected to http://www.knrk.com/ and clicked on "Listen Live" ... and a minute or so later, the little popup window appeared and they were playing some kind of mix tape, had "Cake" (a band I loathe) mixed with something else very similar to them and then "Carolina Liar" and someone else covering one of their songs just a fraction of a second delayed.
Fascinating, and kind of cool.
Well, no, the listing wasn't for a mix and the DJ wasn't the guy who does all the mixes.
And there it was: A second popup window playing at the same time. Killed it. All back to normal.