Complex sentence: After sex, Bob goes outside to his van to get more beer for her, he comes back inside dressed up as a ghost to surprise Lynda but he is ambushed by Michael, pushed up against the wall and stabbed.
Split into simpler sentences: After sex, Bob goes outside to his van to get more beer for her. He comes back inside dressed up as a ghost to surprise Lynda, but he is ambushed by Michael, pushed up against the wall and stabbed.