I was just amusing myself by reading some now defunct threads on this forum and an incident some years ago came to mind. I was in Halfords. The shop was busy and the queue at the inquiry counter was similar to that of a Pub, spread sideways and 2 or 3 deep. I eventually got to the front, directly in front of an assistant. I stood there while he gestured to and dealt with those people on either side of me. When he looked straight over my head and asked the man behind me how he could help, that is when I threw up my arms and called out the above.
It went quiet. There were embarassed faces. And he said "Er, I assumed you were with somebody because, er..." I commented that I might be old, but amazingly I was still able to shop without a keeper. I actually wanted some help regarding an electric bike. I was contemplating buying one (a stiff right hip was making pedalling difficult) but needed to check if they had any smaller models as I have short legs. As it happened, they didn't, but his attitude could have cost him a £1,000 sale. {Eventually, a couple of years later and having failed to find a suitable bike I had to settle for a mobility scooter}.