I hate partners who don't do the work.

Ugh. I facilitated a discussion today. My partner was supposed to help. She barely did, and it seemed like she didn't do the work at all. I just wanted to throttle her and say, "what makes you think this is okay?"
And, to top it off, the prof wasn't there. I feel bad for her, because she has a pinched nerve, but she didn't get to see how useless my partner was. D: