Eliminating Assumptions by Day[9]

Using my twitter reading list (Tester Tower Live) I stumble upon this great four part video lecture on Eliminating Assumptions from Sean Day[9], professional StarCraft player, shoutcaster, and stand-up comedian. Link to video lecture was categorized in my company as against code and ethics rules of my company! Reporting this as a exception to isit department they agreed that this link should be unblocked. In this lecture Day[9], based on his gaming (or should I say testing) experience, lists nine assumptions that work against the player (tester) in problem solving of video games challenges. What shook my mind in this lecture are examples form video games, puzzles and riddles that Day[9] used in explaining why those assumptions are wrong.
Enjoy in lecture!