Asking for your best/most shocking overheard comments that are spoiled, entitled, oblivious to others, self absorbed etc... just for fun!
My favourites are
"Mother, I'm not 12 any more, I can't just be expected to always turn up with the same trainers on"
And (while Christmas shopping in a very busy department store)
"You know, you'd think most of these people would do their shopping in Poundland or somewhere"