I saw on TV Usain Bolt's beautiful 200 meter Olympic run. Wow wow wow.

There are times when the gun pops and a runner hears it and thinks 'go' and then goes.

There are times when a runner skips all the middle steps, the hearing and thinking parts. The gun pops and the runner's gone.

Thinking is a kind of brake. It keeps us from acting on impulse. A person with good judgment thinks before she or he acts.

Yet...not good for a racer.

Lightning doesn't think.

Nor do plants answering light.