15 year old DS has recently gotten very, very heavily into music (as they do). A while ago I told him he could borrow anything he liked from my CD collection, which was met with a rather pitying "yeah, right" kind of look.
Today, he comes home with a list of 10 albums his rock dude mate at school has recommended. I ask what they are and am told "nothing you've ever heard of".
I pick up the list, have a read, walk straight to my CD rack and pick up six of the albums. (Well, one was different album, same group).
HA !!!!!!! 
So, AIBU for walking around with a knowing smirk on my face?
(Disclaimer: I do realise that anyone who describes themselves as "cool", "hip" and "with-it" is generally nothing of the kind, and needs to get themselves back to the 80s).