You have to imagine the scene. I walk to the meeting. Sweaty palms. I re-play every interaction I've had with that colleague in my head, trying to think of what I could have done that offended her. I can't think of anything, which is somehow worse, because I have no idea what I'm walking into.
Then HR rep shows up with a box of markers, paper, and are like, "we're doing drawings!" and I'm just like, "we're what now".
After talking to her, my colleague also thought she was in trouble somehow.