Always tip that pizza driver well, because you never know if they are a GIS major or not. Besides being funny, this is a very interesting ArcGIS Online map. It shows concentrations of pizza consumption in the college town of Shippenburg, PA. It also allows people in that town to see how much your neighbors are tipping. Better tip well, you do not want to be the cheap guy on the block.
I wonder if the map creator is the driver and if now he will get more tips!