This reminds me of having the opposite experience, hearing a Joni Mitchell song I probably hadn't heard in 15 years - she had been a favorite musician of my gf's way back when. The opening notes took me straight back in time - mentally I was heading over to her place, feeling that same age, feeling all the same feelings. Very surreal experience. This was the first time I realized how much rich detail we store in our brains. It was like I had quantum-leaped back into my teenage body. I listened to some more Joni Mitchell songs to recapture the effect, but it got weaker every time - by a lot - the dropoff was very distinct.