Video Of South Tower Being Hit Two Massive Explosions Options

[Paul]

Hi guys found this video interesting, it's a video of the south tower being struck by
flight 175 but what i found interesting is that a second or two after the tower is hit
there are two really loud explosive bangs which sound like actually explosives
going off there is really no delay between the two explosions they occur almost
simultaneously at the same time but my suspicion is the the sounds are faked
i just want to know what you guys think, is there really anyway of telling if they
are or not?

http://www.youtube.com/watch?v=iDmP3ZowyDE...feature=related

Are there any witnesses that anyone know of that heard two explosions or
multiple explosions just after the plane struck the south tower?

WTC 9/11 Rare New Impact Footage [NEW VIDEO QUALITY]

The footage is owned by the camera planet archive

Thanks cheers

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[lunk]

Loud noises tend to echo, especially if there is a large surface nearby.
sound travels through air at about:

http://en.wikipedia.org/wiki/Speed_of_sound

In dry air at 20 °C (68 °F), the speed of sound is 343 meters per second (1,125 ft/s). This equates to 1,236 kilometers per hour (768 mph), or about one kilometer in three seconds and about one mile in five seconds.

My guess, is the sound of the "second" explosion was the echo off the other tower, as there wasn't a visible second explosion, to explain it.