One of the moments where I really noticed the sound design was around the 3:00 minute mark of the Limetown podcast. The sound editor mashed together a bunch of sound bites from news programs detailing what happened in Limetown. But, it was how they did it that actually had me impressed. A sound bite would rise in volume, the listener would pay attention to it, and then it would fade out just as another sound bite would come up. While it seemed like a normal sound function at first, I noticed that the sound bite that was faded out was still going even while the next sound bite was playing. In addition to that, there was still the ominous music in the background. So, the techniques seemed simple at first actually turned out to involve a good deal of layering of sounds.
Also, another technique that impressed me from this same situation was the fact that there was also some maneuvering of sounds with the Left and Right of the speakers. Sound bites tended to start on the left side of speaker and move to the right side of the speaker (or vice versa) as it began to fade. For some reason, that made listening to all those news sound bites a little bit more interesting.