Teams don't fly up and down the court 70 or 80 times, as in basketball, where mistakes can be ironed out over the course of a game.

WSJ: The Magic Behind Manchester City's 3-2 Win Over Tottenham

With their wings beating up to 80 times a minute and their hearts beating hundreds of times a minute, they fly up, down, forwards and even upside down and backwards.

BBC: Hot springs and hummingbirds in Ecuador

They discovered some mechanisms such as their exposure on Zillow that could be scaled up and down on the fly, even daily.

FORBES: When Too Much Success Is A Curse

They needed a quick score in the second half and got one thanks to some sloppy work from Nick Williams, who failed to deal with a Humphreys kick to the left corner which allowed the Ulster fly-half to run up and touch the ball down.

BBC: Ulster 30-6 Aironi

Catching things on the fly, Ayer uses a handheld camera, spinning down alleys, up stairways, in and out of apartments.

NEWYORKER: End of Watch

Catching things on the fly, he uses a handheld camera, spinning down alleys, up stairways, in and out of apartments.

NEWYORKER: Risky Business

But if you believe down to your soul, and demonstrate the actions to back it up, doors will fly open.

FORBES: Hey Leaders: We're Not Inspired! Try This Approach Instead.

This is a walker which has front legs that adjust on the fly with the press of a button, making it possible for a person to use the walker to help get up and down stairs.

FORBES: Innovation For Accessibility