The kid who asks the dumb question saves the whole class from pretending.

In most rooms, confusion is shared and silent. Everyone assumes they are the only one lost, so nobody speaks, and the lesson keeps moving over the top of thirty people who stopped following four minutes ago. One question breaks that spell. The moment it is asked, the room relaxes, because the pretending was costing everyone more than the question ever could.

You do not have to be brave about this, just first. Raise your hand at the exact point you lose the thread rather than waiting to see if it clears up. Afterward, notice how many people thank you on the way out.