Thrillers are designed to keep the audience in anticipation and guessing through techniques like quick cuts, flashbacks, and manipulation of time and space. Common conventions include the use of mirrors to reflect a character's inner self, shadows to build tension, and black and white cinematography to create an eerie tone. Successful thrillers from different eras prey on the minds of characters and aim to mentally demolish them through deceptive mind games and puzzles that keep changing the picture until the ending.