I love people who think joking about my tip is funny. How would they like it if their boss joked about "since you forgot something for thirty seconds, you're not getting paid for this hour!" Today is was a table of three woman, one who informed me she wanted "Hot tea. With real cream. Green tea. And water." without ever looking at me. I had just gotten double sat. So I came back, with a tray full of nine drinks, and as I'm setting her tea down, I laughed and said "I'm sorry, I was so busy making sure I got your cream that I forgot the tea bag!" Her friend pipes up with "Ooooooooh, uh oh! And she's the one paying your tip to! Uh oh!"
There's nothing I can say to that without sounding snotty. I can't laugh without it sounding sarcastic, because I'm not good at faking laughter. So I just said "Oh, lucky for me I can run right back to the kitchen for it then!" with a smile. Apparently that wasn't good enough, because I got a 7% tip. Bitches.