It's quite clear from this video that there are explosive charges placed in the concrete, because the level of dustification is far greater than would be expected in any such collision; I don't know exactly how much dustification would be expected, but obviously it would be less than is seen in the video. Further proof of explosives is shown by the pyroclastic flow that is just initiating on the right of the picture in the first impact sequence before the video stream is deliberately terminated in order to prevent us seeing the emergence of the aircraft nose to the right of the concrete from being seen. It's also clear that dust is coming backwards and sideways from the point of impact; how can a jet plane, which flies forwards, produce debris going sideways and backwards? This simply violates the laws of physics. In any case, this is not a standard civilian F-4, it's clearly a militarised model with increased structural strength, less powerful engines to allow it to fly faster, and underwing hardpoint attachments for missiles, one of which can clearly be seen exploding just before the nose of the airplane appears to hit the concrete. All in all, an obvious piece of planehugger disinfo.
Sorry, I thought this was the Loose Change forum for a minute.
Dave