She went into a seminar on racial trauma that was doing an exercise where students closed their eyes and raised their hand "if they have ever been oppressed". It's important to note they were only encouraged to do this if they felt comfortable doing so.

After the activity, the speaker mentioned that many of the students had shown they had been affected by this. Dr. M, standing in the back, interrupted and said "I only counted 10!" And then stormed out.

Source: this is a primary source account.