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Blast wind: At the explosion site, a vacuum is created by the rapid outward movement of the blast. This vacuum will almost immediately refill itself with the surrounding atmosphere. This creates a very strong pull on any nearby person or structural surface after the initial push effect of the blast has been delivered. As this void is refilled, it creates a high-intensity wind that causes fragmented objects, glass and debris to be drawn back in toward the source of the explosion.
Originally posted by pacifier2012
edited out by me in light of your removed post...
Just a question about the scene I was wondering if anyone knew if it was possible for the glass to be so far out in the sidewalk when supposedly the bomb went off on the sidewalk?