I'm not sure if anyone can have fast enough reflexes on that one...I got 0.438 seconds and it said keep practicing...5 times later still the same score...so what's the best score you can get anyway?
I believe the average human is between 0.3 and 0.4. (This is not for people who are in martial arts, or other reflex and speed enhancing activities. They tend to be higher. Also, so are video game players)