They came closer, and I started to think nothing would happen, they didn't meet our eyes. Then, just as they passed us, they all raised their arms and yelled "Rar!" Thinking to frighten us, I suppose. Instinctively, I yelled back "FUCK YOU!"
Then they were past us, their body language a little sheepish now, and we went into the party.
A few years ago I would have cringed away, or ran and then cried the rest of the day. I'm glad that isn't my response anymore - but I wish I could imagine any response to that kind of situation that would be compassionate and protective at the same time.