As I sit here listening to Pink Floyd's Welcome to the Machine,  I think of one game I played in.  The game was  Ptolus by: Monte Cook.  In this game there is an underground machine and when we got to the fight on this machine we played this song.  So now everytime I hear this song I think of that time.
      I hope that when I run games, there are things that the players will always remembeer.  Some times it is not hard.  I don't think one of my players will ever forget that the last time he played with us, before he moved; he got turned in to a dwarf that was growing a shark fin.  But other times it might  be harder to write soming that will stick.