You sober up pretty fast in the back of cop car. Even faster once you reach the jail.
Along the lines of what you said.
Did her state become that of screaming and hysterical (what the Sane read as traumaized) because she was in a mental hospital and they were restraining her - (INVOLUNTARY COMMITMENT). Was that the source of her trauma. That has to be very scary for anyone.
Especially with her background of unstableness and Psych Wards.