the laugh came from an American song in the 80's that goes like this: I want to be a cowboy, so you can be my cowgirl, mu ha ha ha mu ha ha ha ha
How would Yao feel about the Rockets signing Karl Malone? My guess is that he would have great respect for him.
Re: the evil laugh... I, unfortunately, cannot tell you the true secret origin of the evil laugh, because if I did I would have to kill you. However, I can tell you that carbon-dating tests done on the evil laugh show it to be around 17 million years old. Also, it did not originate on this planet. I first became aware of the evil laugh while a young lad in the '60s -- while I have (technically) "survived" the path of knowledge-about-the-evil-laugh I was put onto at that innocent age, I would strongly discourage anyone from asking too many questions about it, or from putting your nose into places where the malign entities that rule the anti-universe use noses for things you wouldn't even want to have happen to Karl Malone... if you met me you would understand and believe me. Peace.
I can understand Yao. He must sorry for that trade. It's simply him who made Steve Francis' departure. Yao say these words form his heart but diplomatic words.