I don't mean doing something you shouldn't be! 😀
It's more these types of examples, which have happened to me recently -
Browsing card rack in supermarket, needing a couple of birthday cards. Suddenly I felt a tap on the shoulder and it was a neighbour standing there. She launched straight in, 'OMG I was waving at you from over there, you look SO confused picking your cards'! I wasn't confused at all, maybe lost in my own thoughts but why feel the need to comment?!
Enjoying a coffee in the sunshine, while waiting for ds's train to come in. Suddenly a colleague appeared - 'Oh wow lucky you having time for coffee, I haven't stopped today! How are things?' I said Hi and chatted, but it was the only peaceful moment of that day and she cut right into it!
Watering our patio plants and heard 'COO-EE' and it was our neighbour popping his head over the fence. 'I was hoping to catch you, we're going away for a week etc etc'! I almost dropped the watering can! Unless urgent, I wouldn't shout across, I'd see they were in and knock on the door! (Just like, if I see a friend in town and she looks in a world of her own I don't approach and interrupt)!
If I'm meeting up with people/going to work/in local pub etc I'm naturally 'on', but it's when I'm not prepared for that sudden interaction I'm thrown, I suppose! Anybody else?