Complex sentence: His homicidal character is shown through the way he interacts with his victims, for example, Teatime has just entered a heavily locked door: upon entering he sees a cowering guard and tells the guard "I am your worst nightmare".
Split into simpler sentences: His homicidal character is shown through the way he interacts with his victims. For example, upon opening a heavily locked door and passing through, Teatime sees a cowering guard and tells him, "I am your worst nightmare".