> How can one extra pieceof mail for the entire year cause an "unprecedented" volume? Yeah I don't understand it either. McDonald's sell 2 billion burgers a y

> How can one extra pieceof mail for the entire year cause an "unprecedented" volume? Yeah I don't understand it either. McDonald's sell 2 billion burgers a year but when I ordered one million at the drive-thru it caused their system to crash. (Not me, somebody said this on Twitter first.)