Drive Thru Idiots

I really hate it when you pull into a drive thru line and people don't know what they want to order.  What, is this your first time at McDonalds?  Come on, you know what's on the menu.  Get on with it already.  I can understand if you can't find what drink they have or something, but there's not that many options to choose from.  They even have them numbered for you.  Just pick a number.  Or maybe you should just think for a second before you get to the window.  Geez