Yes. I didn't see anyone jump/fall, but spoke to many who did.
The scale of the WTC and what used to be its massive buildings comes through in your account. You were right there, below, but off angle to the impacted portion of the building and yet the scale, angle of view and distance involved prevented you from observing the full import of the first crash.
I, and others, had similar experiences in our observations as to how men and women reacted differently in a general sense. It reminded me of the T. Sowell classification of Constrained and Unconstrained Visions held by all mankind from A Conflict of Visions. Once mindfull of that I was a little more tolerant to the variety of response.
My step-daughter was in DC, had her office shut down and then had to battle her way home past the Pentagon side of the Potomac. Up to a few months ago she lived within blocks of that building. She was stressed by the events and lo and behold voicing comments about the last eight years' legacy tying into our current and future situation. My eldest son, a high school teacher, spent the day with kids impacted by these events as well. He was shaken. Our younger citizens are now becoming aware of the true import of us oldtimers' cautions and warnings in a way that only a very few insightful yougsters, such as yourself, were able to invision pre-disaster.
Its also interesting to note the Burkian, little platoon of family, neighborhood, workplace, and community are the units that we respond with and bond to in all significant events. Economic class, race, ethnic origins, and politics all fall away as we deal with real life. If we could just retain that awareness subsiquently as we revert to our normal lives and resume our societal interactions, rather than picking up the Enlightenment/Marxist masks how better off we'd be.
You were indeed blessed and like all such moments, the future is so much more filled with awe.