Hey. Y'know what really grinds my gears? When waiters/waitresses/servers don't write your order down. You ever get one of these jokers? What, are we supposed to impressed? Are you so proud of your memory that you want to show it off? You think we'll be so impressed by your astounding memory that you'll get a bigger tip? Is that it? Well guess what? Every single time I've had a server do this, they either get stuff wrong and I have to send the food back, and/or they come back to the table six times and go, "I'm sorry; did you say onions, or no onions?" because they forgot.
No tip for you.
Write the Celestia damned order down.