Hummingbirds can fly backwards, and are the only group of birds able to do so. They flap their wings rapidly 15-80 times per second. The bee hummingbird is the smallest bird in the world, weighing in between 3 grams and 24 grams.

[wikipedia]

The cheetah is the world’s fastest cat. As a matter of fact, it’s the speediest of all land animals. Cheetahs in full sprint can reach speeds up to 75 mph and they can accelerate faster than most sports cars. It takes a cheetah less than 3 seconds to reach 60 miles per hour. That can make them very difficult to spot!

[wikipedia]

“During a game, pucks can reach speeds of 100+ mph (160 km/h) when struck and are potentially dangerous to players and spectators.  Puck related injuries at hockey games are not uncommon.  This led to the evolution of various types of protective gear for players, most notably the goalie mask.”

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“The cheetah is the fastest known land animal and moves at speeds reaching 70 miles per hour.”
[http://www.factmonster.com/ipka/A0004737.html]

“Fans, researchers, historians and even the players argue all the time about who was the fastest pitcher of all-time. The most widely quoted response is Nolan Ryan, whose fastball was “officially” clocked by the Guinness Book of World Records at 100.9 miles per hour in a game played on August 20, 1974 versus the Chicago White Sox. A record that”s still included in the book.”
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“An object at rest tends to stay in rest and an object in motion tends to stay in motion in a straight line at constant speed unless acted upon by an outside force.”
[source]