Bank run

A bank run is when lots of people take their money out of a bank all at once, because they think the bank might not be able to pay them back. It is like when you have a piggy bank and one day you get so scared about not having enough money to buy snacks, so you take all of the money out, just in case. With a bank run, everyone is scared and takes all their money out of the bank just in case the bank might not be able to pay them back.