I don't know how tolerant we are at approaching these kind of situations.

As per normal, I would be clueless as why a person would be raging at me randomly.

But really:

1. She could be having a bad day.
2. She could be experiencing the worst kind of pms temper.
3. She could be in a rush.
4. She could be agitated at that point of time
5. She wasn't herself

But you'll never really know what's on her mind though.

Other than advising a 2-breathe rule, try to switch from a different frame of thoughts when it comes to approaching this kind of scenario. Afterall, she's a stranger and you would seldom cross path with her.

Not saying it's not okay to be angry at another person, but give it a benefit of doubt.