From this article:

“You are advised to submit without further delay, for if I bring my army into your land, I will destroy your farms, slay your people, and raze your city.” The Spartan ephors sent back a one word reply: “If.”Alexander would avoid Sparta entirely.

“In 1808, two Frenchmen are said to have fought in balloons over Paris, each attempting to shoot and puncture the other’s balloon; one duelist is said to have been shot down and killed with his second.”

(source)