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dave Decode secret play calls to learn how NFL playbooks are designed and adjusted.
dave Decoding NFL Playbooks
Kill, kill! Switch up the look, we're running the backup play!
dave Bill Walsh's West Coast Offense introduced a word-based system that made plays easier to memorize and adapt.
Playbook weight: A traditional paper NFL playbook could weigh up to 10 pounds and contain over 1,000 pages of diagrams.
dave Playbooks use standardized symbols, solid lines, and dashed lines to represent runs, passes, and blocks.
A play called by the quarterback at the line of scrimmage to replace the play called in the huddle. Quarterback Peyton Manning famously shouted 'Omaha' as an audible to adjust his team's play before the snap.
In Bill Walsh's famous West Coast Offense, what replaced numbers to describe passing routes?
Which NFL team was the very first to replace traditional paper playbooks with iPads in 2011?
Who popularized the classic 'X' and 'O' notation for football plays in the early 20th century?
What happens to an NFL player's iPad playbook if it is reported lost or stolen?
What does the letter 'Y' typically represent in a standard NFL play-call code?
What do the 'O' symbols traditionally represent in standard NFL playbook diagrams?
What type of line is traditionally used in playbooks to indicate a player's pre-snap motion?
How long can a single spoken NFL play call get when fully detailed in the huddle?
dave Play The Little Mud Hopper game to experience the history of cyclocross, from muddy Belgian farm fields to the world championships.
dave Steeplechase on Wheels
Chase the church steeple! (Over the hills!) It's a steeplechase on wheels! (Yeah, no road!)
dave The sport gained official international status in 1924 with the introduction of a major race in Paris.
Muddy origins: Early French racers carried their heavy steel bikes over fences, sometimes covering more miles on foot than on wheels!
dave Early cycling legends used winter off-road racing to build the legendary stamina needed for grueling summer road races.
A horse race run across open country or over a course with hurdles, walls, and ditches to jump. In 1902, Daniel Gousseau organized the first French championship, inspired by cyclists racing between distant church steeples.
What landmark did early French cyclocross racers use as destinations to navigate through the countryside?
What material were the frames of early 20th-century cyclocross bicycles made of?
Why did early road cyclists participate in cyclocross during the winter months?
Who was the famous French cyclist who won both the 1947 Tour de France and the inaugural 1950 Cyclocross World Championship?
What was the name of the unofficial world championship race held near Paris starting in 1924?
Who is credited with organizing the very first French National Cyclocross Championship in 1902?
Which 1910 Tour de France winner credited his mountain climbing success to his winter cyclocross training?
In what year was the first official UCI Cyclocross World Championship held?
dave Baseball 108 Stitches Flight
One hundred eight stitches, watch it fly, oh-oh! They make the curveball break, and the fastball go!
dave Super-Shoes Marathon Records
A carbon plate, in bouncy foam, Gives runners four percent better running economy, Making marathon records fall, since two thousand sixteen.
dave Time your sprint start to discover how sound and nerve speeds limit Olympic reaction times.
dave Olympic 100m Reaction Time
Wait for the signal, don't you jump too fast (no, don't you go!) / A tenth of a second is the boundary line (yeah, that's the line!)
dave Electrical signals travel from the brain, down the spinal cord, to the leg muscles.
Starting line sound: In the 100m sprint, runners in outer lanes hear a traditional starting gun 0.15 seconds later than runners in inner lanes.
dave The auditory cortex of the brain processes the sound of the starting gun before sending a signal to the legs.
What is the biological limit of human reaction time to sound based on?
Why do Olympic sprinters not hear a single traditional gun at the start line?
What medium does the sound of a traditional starting gun travel through to reach a sprinter's ear?
Which part of the brain is responsible for first processing the sound of the starting gun?