That's NICE!
I actually pulled another trick once:
We got no service for a serious while, and there are only very few things in the world that can piss me off as much as if you come to a restaurant and they don't give a damn.
SO I pulled the biggest bill out of my pocket and am intensively WAVING WITH THAT on the waiter and I was shouting that "I WANT TO PAY!"
Now the idiot immediately started to register me - comes over and asks what do I pay, he hasn't even noticed I never ordered anything so I reply:
"NOTHING YOU DUMBASS MORON YOU WOULD HAVE TO SERVE ME FIRST, NOW GET BACK TO DOING NOTHING AND LET ME EAT SOMETHING ACROSS THE STREET!"
