Within just a few hours of the attacks on the Twin Towers, perhaps the most well-known of all the theories had already surfaced in an Internet chat room. The author of that post likened the collapse of the North and South Towers to an act of controlled demolition due to the way the buildings fell so quickly and perfectly into their own footprint. After the dust had settled, theorists raised further evidence in the form of witness testimonies, citing reports of explosions being heard before the Towers collapsed and debris visibly shooting out from the lower levels of the buildings.