A breakfast sandwich and coffee from a sandwich shop on property, no more than a minute walk away. I had a bad hangover and didn't want to deal with the sun and thought "Yeah this'll be an easy tip for someone". The delivery driver got lost, went to a completely wrong store two towns over, and had to call me to give them directions to the correct store. The order arrived, finally, an hour and a half late. The end result was the delivery driver took and delivered the wrong sandwich, wrong name on the bag and everything, and I didn't even get a coffee.

I later found out the place had their own personal website I could order pickup from, so now I order from that and walk there. Hangover be damned.