Dynamics elastic string vibration FSAE race-car carbon-fiber nose-cone pendulum-impact test ice cube crushed with hammer inverted half racquetball jump pool ball center of percussion vs. rail impact height pool draw shot pool jump shot (produced video) paper clip, spring loaded, dropped quarter bounce and spin settle rubber band, tensioned, one end released Slinky descending stairs, with super-slow-motion and song springs bouncing spring shock pulse spring longitudinal vibration two-by-four wall impact test two-by-four oblique wall impact test washer dropped onto a rat trap See also: Pool and Billiards high-speed video collection Toys