Twice actually.
A TACA flight (now Avianca) from San Salvador to JFK. It was an A321 (?) but the plane was pretty much half empty. Of course it was a late night flight.
And there was thunder.
A Delta flight from Las Vegas to JFK. A 737-700 or -800, and same thing, the plane was pretty empty. This flight wasn't really late at night, more like evening.