A faulty ignition module can cause a vehicle to overheat. The vehicle may run and then lose power suddenly due to a rise in the engine's temperature. Once the engine cools, the vehicle will start and run until it overheats again.
In two days the Dow Jones industrial average fell by 25% (ending on Black Tuesday, 29 October). The volume of stocks traded set a record that was not broken for 40 years. When it finally reached its record low in July 1932, the Dow Jones had fallen 89%, and it did not recover to 1929 levels until 1954.
Many correctly point out that the stock market crash which began the Great Depression was in 1929, but actually the worst year for the stock market during the Great Depression was in 1931. And 1931 fits perfectly into the cycle. So we have this pattern of economic crashes occurring approximately every seven years.