system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] How did Harley Quinn get so acrobatic and skilled at fighting?

She starts out as a physically unimpressive bookish psychiatrist. I can accept the mental changes she went through, but she quickly became a skilled a fighter and acrobat. How?
gpt
she used to be a gymnast

>Dr. Harleen Quinzel was a psychiatric intern at Arkham Asylum. A model student, in addition to receiving high grades in college, she was also a dedicated gymnast, winning a scholarship to Gotham City University.