It was just so rude and aggressive. Threw me off from my workout. Had to vent. I'm better now

Maybe she was at her limit and lost coordination while passing you.
Next time just ask what's wrong.

Do you mean with a car? Or a fellow runner? Maybe she was using you as her "rabbit", someone to keep pace with and then "beat" at a certain mile/landmark. That is rude though! It's not what you do, it's how you do it!

I've accidentally cut people off before. I don't think you can assume it was deliberate.