Look what I have come up with in the past hour. A Reflex Tester Application. As per the screen shot below, the application test's your reflex by requiring yourself to react to the change of the background colour. You start the game by pressing the button and you have to quickly click on the stop button whenever you realize the colour in the box has changed.
My fastest record is 0.316 Seconds. Tell me what are your results?
Being true to the applications I have compile, they will not need to be installed and can execute instantly. Keep it in your thumbdrive and have a go at it whenever you are bored. ;)
Download the application and have a go at it.
Enjoy what is left of your weekend.