Roger Waters (Pink Floyd) - The Wall live in Berlin
I happened to be in Berlin for the first time just the week before the concert in 1990. It was a classroom trip to Berlin, months after the wall fell. By accident we were able to get on the concert stage the day before the show and enjoy the view of the "Potsdammer Platz", i.e. the former dead zone between east and west and at the time still a wasteland. I didn't get to see the concert since we left Berlin that day, but looking back it seemed like taking part in some kind of important history.
I was 16 and used to never listen to Pink Floyd before....