Half way up however he stops and begins to tie the tow rope around the mid-section of the ladder and then wraps the length of it around the middle rungs, tying it tightly. The others look down at him confused and angry that he would break the pace of their advance. Worried they would be seen.
When he is done he completes his climb and only when he is over the wall they realise the method behind his madness. The ladder came in two sections, which allowed it to extend, but to pull it up from above would cause it to separate. They would lose the bottom half stranding them on the second level. This way they could pull the ladder up all in one piece. They do so and rest it on the ground as Tommy looks at Brian nodding his head: That was a genius idea!