You played a game so much you could hear the audio cues after you'd finished? It happened to me a short while after Destiny launch, ploughing through the Raid so often with friends, that I would still be able to hear the Oracles singing after I had turned the box off and hit the hay. It was pretty distinctive. More recently, folks have demanded that Icebreaker wielders take care of the Knights flanking Crota during his battle, so now I sometimes hear the whine and groan of them after an intense encounter with the son of Oryx (one of the Grimoire cards says his mum is called Steerix). Am I just weird? I mean, in this regard, it's pretty obvious I'm weird anyway. All the best people are.