Some Fairfield County residents were rattled Sunday afternoon by the sight - and sounds - of four jets.

While some local police departments gave a heads up on social media, many people were unaware that the military jets would be flying overhead.

For about about 30 minutes the F-15 Strike Eagle fighter jets practiced for a planned flyover of Arthur Ashe Stadium for the U.S. Open finals in Queens.

The jets - with Connecticut-made Pratt and Whitney engines - have top speed of 1,875. mph.

While they didn’t fly that fast over Fairfield County, the jets did create a stir.

“We had an awesome view from the backyard. Goose bumps. The coolest,” Susan McCarthy Braden posted on the Darien police department’s Facebook page.

“I swear I thought a plane was going to crash near us,” posted Nancy Lavallo.

At the Open, Rafael Nadal edged Daniil Medvedev 7-5, 6-3, 5-7, 4-6, 6-4 to win his fourth U.S. Open title and 19th Grand Slam trophy overall.

The second-seeded Nadal’s victory Sunday moves him within one major championship of Roger Federer for the most by a man in tennis history.