Scratch

Check out my latest project, reflex test! It's a great way to test out your reflexes! Press the ' test me ' button, then move your mouse to the wait button and wait for it to say 'CLICK'! you can also use the variable sliders to set the minimum and maximum waiting times. Enjoy 
http://scratch.mit.edu/projects/coolstuff/158649
Please post the time in between the reflex (it shows that in a variable in the middle)!