I received this link from one of our interns. I told her she had too much time on her hands 
Dorsal Horn Concerto
http://www.youtube.com/watch?v=OGXn6HuCodE
The scary part is, I understand all of the words they used!
Made me have flashbacks to second year of med school
Ah yes - youtube. I’ve wasted much time on there when I should have been studying.
Some of my favorites:
Diagnosis Wenckebach
These guys are awesome: On Call
Not politically correct or for the easily offended:
The Intern Song
Then, of course, there are the “Med Students of Genius” videos, also on youtube.