Something that’s probably never happened in the history of aviation occurred recently on a JetBlue flight from New York to California: Passengers hoped for babies to start crying. The one-of-a-kind flight was documented for a JetBlue Mother’s Day ad released this week, Adweek reports. After passengers were seated, a flight attendant announced, “This will be the very first flight where crying babies is a good thing.”

To make that happen, JetBlue offered a 25% discount to passengers every time a baby started crying; so four fussy babies equaled a free flight. It worked. Passengers were “cheering and clapping” for crying babies by the time the plane touched down. It made the entire idea of being mad about a sweet, innocent baby crying seem altogether silly.

The ad asks passengers to be patient and understanding of parents traveling with young children. It’s difficult for moms who know that all eyes are on them as they make their way down a crowded aisle with a fussy baby. Parents have to deal with possible negativity from their fellow passengers.” It’s unlikely the crying-baby promotion will become a regular feature at JetBlue. Regardless, jetBlue hopes the next time a mother with a baby sits next to you on a flight, “you’ll greet her with a smile.”