This is the 'bigla' for the literary folks, the 'sanaol' for poets. It’s when your 13th-month pay di-kaginsaginsa appears in your bank account a week early. Or when a plot twist in a teleserye hits you so hard you need a moment. It’s more dramatic and has more flair than your everyday 'bigla na lang'. The 'di-' here is a classic case of 'it's complicated'—instead of negating, it emphasizes the suddenness.