The Knock

So I've got my Arduino and I just want to try it out with a simple knock tutorial.

So naturally I followed the tutorial on the site,
http://arduino.cc/en/Tutorial/KnockSensor

I also read up on the limitations on digital ports. I saw the Knock tutorial code in Arduino software under 'sensor examples'. In no time I had the sensor working fine and generating the word 'Knock'.
This was useful because it got me going with the new kit.