Two excellent videos.
The first, in which George Takei (rightly) calls Clint McCance a douchebag:
[youtube=http://www.youtube.com/watch?v=UACK93xF-FE&w=425&h=344]
And the second, in which Hank Green sings about Phineas Gage:
[youtube=http://www.youtube.com/watch?v=WGl5SUB8IXM&w=500&h=306]