Wow, my parents had one of these way back in the long long ago; I remember it being noisy as hell, but I never knew they could do this. I particularly love the overtones; absofuckinglutley brutal!
If you look closely, you'll notice that the lines improve a little each time, until the printer is fully trained and ready to avenge his brother's death.
I still have my first dot matrix printer, and it will still work with my Windows XP machine. Every so often I drag it out and play with it. I can even still get ribbons for it at Office Max.