The F-16’s official name is “Fighting Falcon”, but “Viper” is commonly used by its pilots and crews, due to a perceived resemblance to a viper snake.
Regardless of what you call it, it’s pretty freaking impressive.
And what’s even more impressive is watching it refuel 30,000 feet up in the air. The cost of the refueling equipment and the specialized aircraft handling of the aircraft to be refueled means it’s usually only used in military operations.
You can understand why!