It was an experimental door bundle. They attached the static line to the floor of the Herc and it broke when they threw the bundle out. No one was hurt, but many good sandbags died in the test.
The song is Lapdance by N.E.R.D.
Edit: Mr. Ted, if you don't have the video yet and still want it, email me at arnold413(at)shaw.ca. Since you're not technically proficient, make sure you replace the "(at)" with "@" in the email address.
Another site that has some interesting videos and some are a little... different as far as military videos go, and it does tend to be mainly American videos but never the less is www.grouchymedia.com unfortunately it too is rarely updated.