So what this says is that sometimes the things that you least expect -- the position in which you put the handle -- have a bigger effect than any of those other things that you were trying to optimize.
（笑) 所以在这里要指出的是 有时候你最不在意的事， 比如你放手柄的位置， 比起其他的事情会造成更大的影响 特别是那些你试图去优化的事。