For example, I got all dressed up for the snow and cycled very carefully all the way to the big Tesco store. I spent about an hour wandering around and filling my basket - this included a Valentine's card.
I got to the checkout, unloaded my basket, went to get my wallet - which wasn't there.
I was 99% certain that it was in the pocket of the jeans I'd been wearing yesterday, but there's always that doubt.
So I put everything back, cycled home and sure enough, there it was.
I guess I should really be relieved - and I am.
But still!
