This is my life.
I went to a well known supermarket recently (slap pert bottom twice) and had learned from L that they now have some self-service tills. So, ever eager to try something new (and fulfil my childhood fantasy of working a till), I thought I'd give them a go. why i thought I could manage this I'll never know.
First mistake - I bought alcohol. One bottle of cider in a total shopping basket of around 5 things. Had to wait for ages for someone to come and confirm that I was in fact over 18. Second mistake - while waiting for the age-confirmation, I put my keys into the shopping bag waiting on the counter for the bottle of cider. Queue flashing sign on screen telling me something unauthorised was in my bag. I had no idea what this meant, so flapped for a bit until a kindly assistant pointed out that my keys in the bag were telling the system that I had tried to take something I hadn't paid for...remove keys, everything fine.
I didn't know the counters were weight-sensitive!! No sympathy from L who thought it was obvious to everyone they would be weight-sensitive. Sometimes I wonder why I leave the house!
(but at least we finlly have a date for the bathroom man to come and fit our new suite! Hurrah!)