We were listening to the whole thing, and at the very end the record is designed to skip back and keep playing the creepy laugh over and over.
So that's where that trick came from! I have Soma by Windhand on vinyl, and the CD/digital recording has ~10min of ambient wind noise at the end, but on the record they did the same trick after ~1min of wind noise. The first time I listened to it I was doing some housework home alone in the dead of winter, so it took me a long time to even realize the record was still playing and that it wasn't just the real wind outside.