What disaster happens in the middle of night book To Kill a Mockingbird?

The disaster that happens in the middle of the night in To Kill a Mockingbird is the attack on Jem and Scout by Bob Ewell.

This happens after Tom Robinson is wrongly convicted of assault, and Ewell vows revenge on Atticus and his family.

While walking home from the Halloween pageant, Jem and Scout are ambushed by Ewell, who attempts to kill them. Jem is seriously injured and Scout is left shaken.