Theory that Radiant Energy Projectiles Falling Through Core Shafts Destroyed the Twin Towers
Careful analysis of the progression of frame shattering in the early parts of both the South and North Tower collapses shows an interesting feature: the wave of destruction, relative to a stationary frame of reference, appears to first move upward past the impact zone, slow, and then follow the top down as it starts to fall.
This feature suggests a fanciful theory of demolition involving projectiles falling through elevator shafts, having either been released from a position near the impact zone, or hurled up from the basement with enough force to reach the impact zone before starting to fall. The projectiles would be timed to begin radiating intense energy just as they started to fall.
Radiant projectiles might have been part of a system involving a directed energy weapon. For example, a buried reactor could have focused much of the energy from some kind of reactor into a focused vertical beam, coaxial with the trajectory of a projectile. The projectile could have been designed to absorb energy from the beam, and re-radiate it. The reactor would be timed to start just as the projectile approached the impact zone. The reactor and projectile might have been designed to survive for only a few seconds before disintegrating.
Each Tower may have have been rigged with two such systems, as a backup against failure. In that case, the two may have been launched either simultaneously, or in a slightly staggered manner.
Problems with the Radiant Projectiles Theory
The most obvious problem with this theory is its lack of detail, without which its technical feasability cannot be evaluated. What form of energy would the projectiles radiate? Could that energy produce the observed pattern of destruction? What would be the power source?
A specific problem with the theory is that it is challenged to explain how the North Tower was not noticably damaged by the collapse of the South Tower, just 120 feet away. If the energy emmanating from the projectiles was strong enough to shatter the South Tower's perimeter walls, wouldn't it have been strong enough to at least visibly damage the closest parts of the North Tower's perimeter walls, which were only slightly more that twice as far from the projectiles?