I was coming into my children's school a few days ago, I have a pram and another lady with a pram moved hers over slightly as I was coming through (talking like an inch) anyway as I passed she rudely huffed "ugh your welcome!" I was abit taken aback. Now since then (and when ever I do it before anyway) no one ever "thanks" me. I've just moved out the way for a woman and a man and two kids and didn't get any acknowledgement. I also always move my pram out for another one to fit in and it's very rare anyone says thanks they usually just roll it in. I don't expect a thanks but also don't understand why some people get angry/rude about it. So what are the 'rules'?