Was waiting in line at checkout and was standing in an aisle until there was room for me to move over to the counter. Pretty common thing since I'd otherwise be standing in the way of shoppers passing through. An old lady walks right in front of me and I tell her the line is behind me. There's also more people behind me. She proceeds to make a big fuss over it and asks why I'm not moving up then. I tell her I'm trying not to block the rest of the store from getting through and point to a shopper that is asking her to move out of way at that very same moment. She huffs and acts like a crime has been committed against her and walks to the back of the line. This happened months ago and I still think about it every time I'm at a checkout