When you're selectively remembering how excellent your musical tastes were back in high school and college-- how you listened to The Clash and My Bloody Valentine and De La Soul . . . how you were the first to get into Appetite for Destruction and Shake Your Moneymaker and Louder Than Love and and Paul's Boutique . . . when you are reminiscing about the times you saw Soundgarden and Jane's Addiction and Guns N Roses and The Feelies and R.E.M. -- your old friends are there to remind you about that Judas Priest mixed tape you made for them.