I get to the checkout which is absolutely free, start loading all my stuff on the conveyor belt. I have a trolleyful then the woman behind be puts up the separator thingie and starts loading too. I've still got tons of shopping to load and she's left me with no room. Then gets shirty when I politely ask if she would mind waiting until I've unloaded all my stuff. Honestly, some people have no sense of awareness of the world around them!!!