Complex sentence: With Ryan dead, Leatherface prepares to kill Michelle with his chainsaw, the noise attracting Benny, who opens fire on the house with rifle, killing Mama and Tinker and partially destroying Grandpa's body.
Split into simpler sentences: With Ryan dead, Leatherface prepares to kill Michelle with his chainsaw. The noise attracts Benny, who opens fire on the house with rifle, killing Mama and Tinker and partially destroying Grandpa's body.