Wristwatch Movies

Some questions about film Saw IV?
1. While the autopsy scene at the beginning Why did they remove and weigh the brain of John Cramer, aka Jigsaw? 2. In a flashback to the accident Jill, Jigsaw throws a wristwatch. Why does he do that?
1. The brain is the autopsy by experienced staff in order to obtain tissue for research. Brain autopsy provides a definitive confirmation of a diagnosis dementia or other brain-related diseases, because there are several possible causes. ** Jigsaw had cancer and he became a killer homocidal. They were more likely to study the brain tissue to determine if anything in particular with his brain caused him to become a killer. They use research to try predict similar behavior in other similar diagnoses patients. More filmmakers probably just wanted people Gross Out. It is a horror. 2. When John is in the hospital, he discovers he has cancer. He will die. Then throw the watch not mean it is timeless. Time has no hold on him. Life took another meaning for him. His life took a new meaning. That's why he started "playing games" with the people. Life is not about time, it is to do more with the time you have.
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