150k-200k: Again a really nice course and my spirits rose nearing the end. However body started failing. Hot-foot with 25k to go, lower back pain which I had been managing started to get out of control, and right hamstring/calf/back of the knee started to go.
Finish: burst balloon.
If the last stages are round the bloody reservoir still I reckon you were delusional by that point. Thats the worst bit.