These are what I considered to be one of my most mind changing life lessons, it's about how things aren't always what they seem.
This baffled me for months until I was able to fully grasp it (without this video which helps a lot).
http://youtu.be/9vRUxbzJZ9Y
This is great about how the odds are not always what they seem.
http://youtu.be/jFzahAm3qFQ