Peculiarity or uncharacteristic aberration, occurring at a point of no return.
MATHEMATICAL
Point at which an object no longer conforms to a regular model, acting abnormally.
TECHNOLOGICAL
Point at which human engineering outgrows it creators, causing unalterable consequences to human civilization.
SOCIALOGICAL
Point where deterministic chaos and complexity cause indelible changes to human culture.
AESTHETIC
Point where all the previous conditions upend the conventional dynamics governing the visualization, creation and dissemination of beliefs and ideas.