Jonah managed to get rice all over his face at dinner (no surprise) and in wiping it, a piece went in his nose. So he sticks his finger up his nostril and wedges it in even farther. Without thinking, I held one nostril and instructed him to blow. Poof! Out flies the grain of rice.
Now let's just hope he doesn't decide this was a cool trick to repeat... next time I may take the time to find the nasal aspirator.