Was this your nanny and your precious son (horror story)?

I've never posted one of these "I saw your nanny" things, but
something I saw today has me really upset and hoping that we can find
a little boy's parents and tell them this story. I work at the
Howard Hughes Center (where the Bridge theater is) and at lunch
today, my girlfriend and I walked by an outdoor table where a nanny
was talking on her cell phone while a beautiful 2-ish year old boy
with blond curly hair was standing near her. For whatever reason,
she yanked on his arm, causing him to crash forehead first (hard!)
into the corner of the wood table and then he fell to the ground,
crying hysterically. She grabbed him by the arm again and yanked him
up, ignoring his tears, and never once stopped her phone conversation
or comforted the boy or even looked at him. It was beyond
heartbreaking. Afraid to intervene (I know, I should grow a pair),
my friend and I went into lunch. When we came out a half hour later,
the nanny was still there, STILL on her phone, and the boy was just
staring into space sitting in his umbrella stroller. Here are the
details I remember: the little boy was white, with blond curly hair,
around 2, wearing a khaki green and white striped shirt and khaki
green pants. He had a beige/brownish umbrella stroller, maybe a
Graco. The nanny was African-American, middle age (it was hard to
tell with the hat...could have been 40's even to 60's) wearing blue
jeans, a blue jean jacket/shirt and a black hat with white "racing
stripes" on it. I think she had a black knapsack with the same white
stripes. She was wearing big gold hoop earrings and had a gold band
on her left ring finger. Could she have been your nanny with your
beautiful, sweet boy? Could you know someone whose nanny or little
boy fits this description? It was so sad and I just can't stop
thinking about it. Pass this on to anyone that might have had their
child with this woman today and needs to see this.