Crises are nearly always unexpected. When Russia defaulted in 1998, it caused a crisis because the markets didn't see it coming. But Argentina's much larger default in 2001, or Venezuela's in 2018, caused barely a broader ripple because they were so clearly signposted and expected.
The chart of the last five years of the Lehman Brothers' share price shows a company going to zero in pretty much the most orderly way you could imagine. It doesn't suddenly plunge at the end; rather, the decline begins in mid-January 2007, a full 20 months before catastrophe strikes. This chart is a chronicle of a bankruptcy foretold.