Complex sentence: Himal incurs a serious head injury in a fight with Jenny's new boyfriend and his friends; in the hospital after surgery, he realizes the error of his ways and vows to turn over a new leaf.
Split into simpler sentences: Himal incurs a serious head injury in a fight with Jenny's new boyfriend and his friends. While in the hospital after surgery, he realizes the error of his ways and vows to turn over a new leaf.