Turning Point

axis change climacteric climax contingency crisis critical mass critical moment critical period critical point crossing crossroads crucial moment crucial occurrence crucial period crunch crux culmination cusp decisive moment defining moment development emergency exigency high noon hinge juncture kairotic moment moment of truth moment of truth nexus pass peak peripeteia pinch pivot pivotal moment point of no return race against time rising action shift strait transition turn of the tide twist when push comes to shove zero hour zero hour