Pie chart: The world's worst way to display time-series data. http://o.aolcdn.com/hss/storage/adam/2c59e6862a532820a9854bd...
For the statisticians and data scientists in the room : do pie charts ever have a valid use case (as defined by being superior to another form of visualization)?
(so no one has to click blindly, it's a photo of a pie showing how much of it was eaten or not)