The moment you become you.

Here we see a video of the moment the ova is penetrated by the sperm. This "Flash of light" has been recorded during the most impressionable moment of your entire life. The most rapid physiological changes that occur throughout your life is when the egg is penetrated by the sperm, cell division rapidly commences and you get your first impression of the universe itself - so sensitive you can actually sense the position of the planets through their gravitational pull. This flash of light produced by "zinc sparks" could also very well represent the moment your very soul enters the ova.  The brighter the spark, the healthier the baby.