"It does sound like her knickers were in a twist."
"Why do you think she said that?"
"What were you thinking while this was going on?"
"I can imagine your face now."
"How did you keep from laughing/scratching her eyes out/crying?"
Venting is just that, she wants to share her feelings so engage them. I still get surprised when I think I did nothing to help and I get complimented for helping her.
It's funny......I have lurked around here, and have occasionally posted, for more than year. I repeatedly look for the advice/comments/wisdom of Coach in the form of his previous posts. What is written above really does capture how to deal with venting.