Pope Francis spoke out on last week’s terrorist attack on Charlie Hebdo in Paris, suggesting there should be limits to freedom of expression, especially when dealing with insults to religion.

“If my good friend Dr. Gasparri says a curse word against my mother, he can expect a punch,” Francis said, according to numerous press reports. “It’s normal. You cannot provoke. You cannot insult the faith of others. You cannot make fun of the faith of others.”

The pope, who made the comments today during a mid-flight press conference en route to an official visit to the Philippines, was referring to Alberto Gasparri, his event scheduler, throwing a pretend punch his way.

Francis continued: “There are so many people who speak badly about religions or other religions, who make fun of them, who make a game out of the religions of others. They are provocateurs. And what happens to them is what would happen to Dr. Gasparri if he says a curse word against my mother. There is a limit.”

Naturally, people from around the globe flocked to Twitter to react.