The fact the reflection is there makes it funnier.

I remember this kid.
I wish I could go back in time, at that exact moment, and appear as myself right now, a full grown adult, and scream in the little fucker's face, "And what if I told you you're gonna grow up to be a SOFT PATHETIC CUNT WHO DROPS OUT OF COLLEGE FIRST SEMESTER AND LIVES TO BE A BURGER FLIPPER CAUSE YOUR DADDY WASN'T THERE TO SAVE YOUR PUNK LITTLE ASS, YOU SHIT-HEAD."

Then again I had issues with a lot of people as a kid so this might be a general overreaction (and a hard sign of unresolved psychological issues).