That brings back memories. Not that I was on the urine myself (!), but I had occasion to visit a REME unit during St Eligius Day. Certainly made an impression on a non-British passenger. Effect enhanced by the fact that strange REME rituals had just finished so no obvious explanation, just soldiers going about the camp wearing togas. Impression on puzzled passenger possibly also enhanced by the fact that I was too preoccupied at the time to explain or comment.