TBH I’d just say a cool hello, and move on.
While on holiday in her early 20s, at a buzzing nightclub abroad, a dd once bumped into the 2 little bitches who’d bullied her at school.
At first it was all nice and sweet fake-friendly, but dd then went back to her own friends, saying, ‘God, I wish I’d told them what I really think of them!’
And ((having had a few drinks by then) she did!
She could be decidedly fiery once roused, and really let rip. The two were too overwhelmed to say anything much but a male friend who was with them said something like, ‘Hey, steady on..’.
She turned to him with flashing eyes and told him to stay out of it!
She phoned me next day to tell me about it, saying, ‘Ooh, it was lovely!’