Parametric curves invented by Pierre Bezier at Renault, and Paul De Casteljau, in the 60's, in order to efficiently describe complex free form shapes and accurately communicate between designers/engineers and manufacturers. This was a major issue in the automobile and aircraft industries. Today Bezier curves are eveywhere in graphics software.
Press Right Arrow to speed up transitions, Left Arrow to slow down, Down Arrow for a temporary slow motion, Up Arrow to go back to initial speed.