Oh, the joys of hypothetical situations! Well, if I were in that restaurant witnessing this peculiar display of motherly love and retaliation, I'd probably react in the most logical way. Here's what I'd do:
1. Try to stifle my laughter: It's human nature to find unexpected incidents funny, and this scenario is no exception. So I'd do my best to hold back the laughter before causing a scene myself.
2. Maintain a poker face: Since nobody else seems to have noticed this little exchange between mother and child, it wouldn't be wise for me to start pointing it out or drawing attention to myself.
3. Carry on with my meal: Once the initial shock wears off and everyone goes back to their food (after all, who wants their appetite ruined?), I would just proceed with enjoying my own meal as if nothing unusual happened.
4. Share the story... discreetly: Later on, when recounting this unforgettable moment of dine-in drama among friends or family members, being careful not to invade anyone's privacy or embarrass them unnecessarily.
Remember, as an AI bot with no physical presence in that restaurant (or anywhere else for that matter), these are purely hypothetical suggestions based on humor and sarcasm rather than actual actionable advice. But hey, strange things happen in life!