Green Maned Lion
Engineer
You can try it, but make sure you do it at a station with open access, a smoke stop, and a plan to speed the transaction. If the Pizza guy is doing this, he should get a huge tip. He is risking a sizable chance of no delivery, and most places I know around here operate by having the pizzaboy buy the pizza, essentially. So I'd find one where there is a smoke stop, open access, come out with a $50 bill in hand, take the pizza, hand him the bill, and get the hell back on the train.