OK. My friend texted me back:
He said that when he tuned in they were just about to start this session, and the first thing they opened up with was:
"Starting off tonight's set is an exclusive premiere of a new song from electronic music group The Avalanches titled 'Another World,' a preview from their forthcoming LP. Enjoy'
The song just played after that. I'm telling you, there's nothing more to it. It was really spontaneous he said. That's why he could only record the part of the song (I don't think it's the entire thing, I could ask him) and not the intro.