High strung over elevator

I don't know what's up with the people around me today.

A lady and I arrived at the elevator waiting area at the same at time but being the gentleman that I try to be, I let her press the button first (up) and I pressed down because I was going to the basement parking.

The elevator was on its way down from the upper floors so I got in when it opened. As soon as she saw that the elevator was not going up, she growled at me like an annoyed animal.

Is it my fault that the elevator was supposed to work that way?

EDIT: To clarify, she did not even get in the elevator. She growled at me from the outside.