Reactions Faster than Actions

People move faster when reacting than when initiating the same movement. But the ultimate outcome is not so simple.
"Twenty-one milliseconds may seem like a tiny difference, and it probably wouldn't save you in a Wild West duel because your brain takes around 200 milliseconds to respond to what your opponent is doing, but it could mean the difference between life and death when you are trying to avoid an oncoming bus!"

Interesting