Comic #104 : "The Night Traffic Grovel, Part 4: sudo kill Sue Du"

I filmed a video of me drawing the hidden image in today's comic. Unfortunately when I reviewed the footage I had stuck my head in the way of the camera for most of the video. Now, if someone knows a way of recording the screen from a Galaxy Note 2 and can tell me how to do it (preferably without spending any money or rooting the phone) I would be eternally grateful as ultimately, that's a much better way of recording it than by pointing a camera at the desk.