Tsunade calmly collected her fried deliciousness, paid the vendor (he tried to give it to her for free, and she waved him off, dropping more money than was entirely necessary on the counter), and sat down on the bench. There were other places to sit, but none that had quite this amount of shade-- or this opportunity to exact her (petty) revenge.

Two bites in, she whipped her hand out and flicked the kid's ear with her middle finger, rather harder than was called for. She neither looked to where the kid was sitting nor did her body language change at all, she just kept eating as if she had merely been waving a fly away from her food.