Saying *I don't actually understand this* in a room full of people who seem to is one of the braver things anyone does at work, and it never gets described that way.
Most courage is like that. Verbal, unwitnessed, over in four seconds. Telling someone the truth about how you're really doing. Admitting at a table full of relatives that you were wrong.
The dramatic kind gets the films. The domestic kind runs your actual life, and it's the one you'll need this week. You've done it before, probably more recently than you remember. It just didn't feel like anything at the time.