Waribashi (割り箸） are those wooden chopsticks that you need to break apart. Some people rub them together as a matter of course, but this is only even needed if the chopsticks are so cheap that they are splintery. Doing this with good quality waribashi indicates that you think they are cheap, and therefore is an insult.
Many modern 35 mm film projectors use three-blade shutters to give 72 images per second—each frame is flashed on screen three times. Motion picture film In the motion picture industry, where traditional film stock is used, the industry standard filming and projection formats are 24 frames per second (fps).