When I was a kid in England we used to play football on the grass pitch in the park almost every day, and always the Park Keeper, known as the Parky, would come out of his hut and chase us away, apparently we thought trying to catch us and take us to the Police. We used to shout, 'Parky!!!' and run for it. This situation explains why I never played for Chelsea and why England keep failing to win the Workd Cup again.
While I was fiddling about setting this cache in the dark a guard muggle (Parky) suddenly appeared right next to me, startling me. My instinct was to shout, "Parky" and run. Instead I stayed where I was and played with my phone. She ignored me and strolled on, bored.
Day and night you will see people running round the trail here.