We did this once as well. The waitress followed us out to the parking lot and told us that we forgot to leave her a tip. We responded back that we had not, that her tip was indicative of the level of service we received. She told us she was going to call the police on us. Bless her heart. I hope she found a different line of work otherwise, I fear we’re all paying her expenses each month. LOL
He didn't come back out.
Story you may like: Years ago, dinner for 12, celebrating a college graduation. Nice restaurant, lousy service. $700 + tab. My father-in-law, was the host, left three 20's as the tip. As we walked out, he was in front of me and I was bringing up the rear.
Waiter approaches him, the bill folder was open, three 20's on display. Waiter says: "Sir, I think you may have made a mistake."
Without missing a beat, F-I-L, says: "You're right son, thank you very much." As he says this he picks up one of the 20's! I bet that waiter never pulled that one again.