the event that dramatizes

"A lighting bolt flashes between different intensities, but it is preceded by an obscure precursor, invisible, imperceptible, which determines in advance the inverted path as in negative relief, because this path is first the agent of communication between series of differences. If it is true that every system is an intensive field of individuation constructed on a series of heterogeneous or disparate boundaries, then when the series come into communication thanks to the action of the obscure precursor, this communication induces certain phenomena: coupling between series, internal resonance within the system, and inevitable movement in the form of an amplitude that goes beyond the most basic series themselves. It is under these conditions that a system fills up with qualities and develops in extension. Because a quality is always a sign or an event that rises from the depths, that flashes between different intensities, and that lasts as long as it takes for its constitutive difference to be nullified. And most importantly, these conditions taken together determine spatio-temporal dynamism, which themselves are responsible for generating qualities and extensions."
Deleuze, Gilles. The method of Dramatization