Parenting is driving to the store for grapes at night in the rain because it's all your sick 4-year-old says he will eat...
...then after eating a few of the grapes he says he doesn't like the "inside part" of the grape, and just likes the juice. Now he wants grape juice.
I'm not proud to admit that I ended up blending grape jelly with apple juice for him, since we didn't have any grape juice. But he loved it, so... I'll take the win.
Who am I to recommend how a stranger punishes someone who was once a stranger to them, but still I would respectfully recommend a parent consider punishments that do include guillotines.