A few years ago I was shopping in Asda, I was at the fish counter, the guy who was serving was talking to a man, who I thought was a customer, but apparently not, because another man came up to the counter, stood in front of me, the guy who was serving turned to him and asked what he would like, I said ,,,excuse me I'm next, I've been here for ages, no your not ,he said , this customer's next, I turned to the girl packing the shelves and asked her if she could see me ,or was I invisible..the guy serving then asked what I wanted, I told him I WAS going to buy salmon, but told him where he could shove it , then walked off and reported him. I never saw him at that counter again..