I left an extravagant tip for the waiter, then walked back to my building.
The above is just an ordinary sentence. The reason it’s Sentence of the Day is: the narrator is flat broke. His eating out was a gesture of defiance. He had scrimped so long, but accidentally cracked two eggs which were supposed to be his meal for the day. They fell on the floor and he had a meltdown, went straight to the nearest restaurant and spent his precious remaining dollars.