Blue Angels Video - Is it a Fake?

If you visit the following URL you'll see a video:
http://www.airspacemag.com/asm/mag/supp/fm00/Blues.html
the last portion of which shows what appears to be a Blue Angels F-18 roll
only to reveal that, in fact, it was 2 planes flying so close, the plane in
the background was completely obscured by the other.

I've stepped back and forth through this "footage" and I cannot believe it
is real. Those pilots are indeed praise worthy but the stunt captured in
this film looks too much like visual effects. The image of the one plane
simply separates from the other. Is there anyone here who can vouch for the
legitimacy of this video?