  We record the breaking of water waves focusing at the Huygens Cusp of a
parabolic wave maker using a fast video camera at a rate of 2000 images per
second. The movie shows the very early time of the water tongue plunging ahead
of the wave crest. Soon after, some capillarity wavelets are clearly visible.
The image analysis of these space time data permits the measurement of the
expected 3/2 power of time law as dictated by the cusp singular geometry given
by the Catastrophe Theory. To our knowledge this is the first time that this
scaling law is measured from fluid dynamics videos.
