An action to do when getting a delivery of pizza. Generally the minimum is $2 or 15% of the order, but if you want consistent excellent service feel free to overtip, because drivers remember good customers. Conversely, if you want bad service don't tip, and wait for your pizza 1 hour +. Do not assume a delivery fee is given to the driver, since even if it is s/he may only recieve service wage ($2.23 in MA) or no mileage.
"16.75 for three pizzas."
"Here's a twenty, keep the change."