If mine were more than 10-15 minutes late (and she wasn't in her office with someone else running over time), I would have left. That's an action, though, not an emotion. I would have felt empowered for being assertive, and would have required an explanation and possibly an apology if it was warranted (her dealing with a time-sensitive personal crisis does not require an apology; her losing track of the time or a scheduling mistake requires an acknowledgement that I was inconvenienced). My time is valuable, and I won't sit there waiting for someone to maybe show up. I tend to reserve my emotional reaction until I know what happened, since there are plenty of valid reasons that have nothing to do with me for someone to be late and be unable to communicate it.