Muchas gracias

A small image from yesterday.
The bus leaving and suddenly stopping right as I was ready to cross the street. The door opened and a woman called after someone who had just got off the bus.
I turned around to see another woman, wearing a T-shirt with glittering letters reflecting the light of the lamp post. She was
hurrying toward another stop to catch a connecting bus, but stopped, turned around with a worried look and then smiled with relief.
She rushed back toward the bus door and the woman still standing there handed her a cell phone and a set of keys.
Thoughts of what could have been a disastrous evening. Relief.
I hear the exchange. "Thank you!" and then "Muchas gracias!" as if the thank-you would be stronger in her own language.
"De nada, Señora, de nada".