1 1.0 is normal speed, 0 is stopped, numbers between 0 and 1.0 are slower playback, negative numbers are rewind and numbers higher than 1.0 are faster playback.  The forward and backward buttons to the right of Play speed are for moving videos frame by frame.
Slow Food Movement. An international movement begun by Carlo Petrini with a forerunner organisation, Arcigola, founded in 1986 to resist the opening of a McDonald's (fast food restaurant) near the Spanish Steps in Rome.
Propulsion. Two types of movements are responsible for moving food from your stomach to your intestines. The first is called propulsion -- moving your food forward, from your esophagus into your stomach and from your stomach to your small intestine. This movement requires a lot of muscle. Think about propulsion like squeezing a toothpaste tube. When you squeeze at the top, the toothpaste moves down.