The Who's Baba O'Reily, played using only items from Think Geek.

I watched this while trying to drink my coffee this morning.

I say "trying" because I just sat here with my mouth hanging open until the whole thing was over. This is pure brilliance. 

Anyway, it seems appropriate to share this as I'm going out the door to start work on The Big Bang Theory:

 (Seen on Reddit )