Documentary "Watching" on film openings

We had to watch a documentary on thriller opening and their impact on the emotion and suspense of the audience  the documentary was half hour long and explains older films how older films show suspense. The documentary also includes Alfred Hitchcock film psycho and his views on making a enjoyable thriller.

Thomas Sutcliffe said that "Films need to seduce their audience into long term commitment. While there are many different type of seduction, the temptation to go for instant arousal is almost irresistible". By this he means that the film has to have constant of action or suspense to keep the audience attention, what he means by "instant arousal  is almost irresistible" that to go straight into the suspense would drag the audience attention.

However, Jean Jacques Beineix says that their risk into "instant arousal" that after grabbing the audience attention and maintain arousal if not your film becomes a big disaster.