>http://www.exploratorium.edu/baseball/reactiontime.html

>"Fastball Reaction Time"

>Click on the "play ball" button, then move your cursor over the part of the
>screen that shows the baseball field. As soon as you see "swing batter,"
>click on your screen as fast as you can.

>Fastball Reaction Time imitates a 90-mph fastball thrown by a major league
>pitcher. While this exhibit doesn't test if you could actually hit a
>fastball, it does test whether you could react in time to hit one. When you
>see the "swing batter" screen, a signal in your eye sends a message to a
>part of your brain that controls your muscles. Your brain must then send a
>signal to your muscles, telling them to click. Although it takes some time
>for the signal to travel along each nerve, the major delay in your reaction
>time occurs at the junction points in between the different nerves involved,
>and between the nerves and the muscles in your fingers.

>---

>I can get a 'hit', with my fastest reaction time of 0.20 sec., 1/5th of a
>second.
>Anything slower than 0.25 sec. (1/4th sec.) is probably going to be a
>swing-and-a-miss.

>Batter-up!