I've never 'got'

What I don't get is the fluorescent 'horse and rider' waistcoats, like a fucking great horse is easy to miss......

This nearly saved my bacon a few weeks back to be honest. An absolute bollock of a human was wearing one as she was walking down the grass verge at the side of the road in front of me. I didn't think much of it until there was a gap in the hedgerow to my left and out of it ambles a gigantic fucking horse. I slowed right down and asked the rider (at a shout) why she wasn't controlling the 500 kilo bastard animal, and she informed me that it was blackberry season and I should help her pick the hedgerows. I was so shocked.