Creative Speculation

Buildings don't fall at 10 stories a second due to fire. Planes break up on impact, and cannot break through steel and concrete. And planes cannot fly at high speeds so low to the ground, and it would have been almost impossible to hit the towers going so slow. And the plane engines would have been deafening for those in the streets. So let's ignore the explosions in the basement that firemen had reported too. Let's ignore the lobby with it's windows blown out, but windows closer to the impact are intact. Let's ignore science.