章 1667: Chapter 1667-spinning silk from a cocoon

Zhang Zian sat up straight on the bed. His whole body was soaked in sweat, and his sweatshirt stuck to his body. It was very uncomfortable.

His vision turned black, as if the image of him falling off the cliff was still lingering in his mind. His heart was beating in a straight line. It seemed that people said that if one died in the dream, one's body would also die in reality. This might not be a lie.

The brain can't differentiate between dream and reality, thinking that it's in danger, it will drive the body to make a stress response, releasing a large amount of hormones, accelerating the heartbeat and blood pressure, and may stop the heart if it exceeds the limit.

He sat on the bed in a daze for a long time before he gradually recovered.

If this continued, he would get a heart attack from this terrifying butterfly sooner or later.