The human brain, an incredible and unmatched machine! Did you know that our brain works in two different ways to save us time and resources? Here is what happens: The first gear of the brain (unlike the first gear of the car) is the fast-thinking mode. The brain reacts to a stimulation instantly by using as less resources as possible to come to a result. We have absolutely no control on this process and many times the results are wrong. But thanks to this process, we can free brain-power to do multitasking (before windows). So for example, thanks to the fast-thinking mode, we can see, walk and chew gum simultaneously and still leave a lot of brain resources free to thin (until the street pole appears)
The second gear is the slow thinking mode. Our brain enters this mode when we put effort to think something. We operate in the second gear when for example we solve a mathematical equation, or take part in a discussion, or text an SMS to a friend. In this mode, we use a lot of the brain resources for one particular purpose, so driving the car and texting an SMS will probably lead into an accident.
Watch the following video which has a brilliant test!