It's pretty creepy that you can see yellow balloons, just like the ones that are being carried by the lady in front of the suspects in the FBI video, float away from right beside the explosion in the original boston globe vid.
Woah... this is also creepy, shows victims of the bomb, standing in the crowd before the explosion, don't really get the point of it but it's definitely a little scary:
http://i.imgur.com/u5NC4zJ.jpg