If you are researching this for academic, journalistic, or historical purposes, I can instead help you with:
In one documented instance, a falling person struck and killed FDNY firefighter Danny Suhr as he was entering the South Tower. The "Falling Man" Controversy world trade center jumpers
Some jumped due to the intense heat, smoke, and toxic fumes that made it difficult to breathe. Others may have been driven by the fear of being trapped or crushed by the collapsing tower. A few jumpers were reportedly motivated by a desire to escape the flames or to avoid a potentially more agonizing death by burning or suffocation. If you are researching this for academic, journalistic,