They weren't being rude to me directly, but:

I was once at a ballgame, and there were 2-3 very loud, very obnoxious people spoiling the fun.

"That player sucks!" "Hey! Random stranger wearing a hat for a team that isn't even here today, you suck!" "Hey camera man, you suck!" Etc...

Other people would ask them nicely to keep it down. The jerks got louder. People tried to be as rude in response. The jerks got louder.

Finally, I had had enough. I stood up, turned around, and looked directly at them. In my loudest, most booming, commanding voice, I yelled:

"THE SQUARE OF THE HYPOTENUSE OF A RIGHT TRIANGLE IS EQUAL TO THE SUM OF THE SQUARES OF THE REMAINING TWO SIDES!!!! WOOOOOOO!"

I turned around and sat down. My companions, bewildered, asked me:

"What the Hell was that about?"

"Have they gone quiet?"

"...Uh... Yeah."

"And they'll stay confused and quiet for at least another 15 minutes"

(They kept quiet the rest of the game)