http://www.youtube.com/watch?v=YIhayNe6BAU
http://www.youtube.com/watch?v=KQowILC51dw&feature=channel
http://www.youtube.com/watch?v=JoUtVu80kD0
One more, peripherally related:
http://www.youtube.com/watch?v=To4AM7yyGqM&feature=related