There is something very stealthy about the way that brambles move around. The shoot in the photo above has used its prickles to grip the far side of the mossy wall, then extended its growth until it reached the top of the six foot barrier and is now undulating along this side of the wall.
Eventually that long shoot will bend under its own weight, towards the ground....
..... and when it touches the soil this will happen - adventitious roots will form.
Now, securely anchored and with an additional supply of mineral nutrients and water, a new, long, arching shoot is beginning to form and soon the whole process will begin again. Constantly conquering new territories, bounding across the landscape.