Didn’t he destroy Terra Haute in his Detective spoof movie?
But that wasn't what I was thinking of. Back when Steve was still doing stand-up, he had in his routine that Terre Haute, ID was the most "nowhere" place in America.
This turned into a feud where the mayor of the city issued a proclamation ordering Steve Martin to come to Terry Haute and apologize. Steve did come back and was given grand tour of the city. It was actually light-hearted and in good fun. Steve got the last laugh in the "Dead Men Don't Wear Plaid" movie when he had Terre Haute blown up.