Right beside my Xbox 360 on my desk is my laptop and as soon as I pressed A to select the easy difficulty on the console, I started a timer in the Windows 8 App. It's not important but as soon as I hit the loading portion for each chapter I would mark a lap so I know how long it took me to beat it. As soon as Faith kicked Jacknife off the Helicopter I clicked on the final lap marking and paused the timer shortly afterwards (which is why the 10th lap is a second or so shorter than the paused time).
 
http://imgur.com/Ct9vDE5