Tonight's compilation includes the struggle to free two men trapped in their sinking powerboat after a spectacular crash off the coast of Guernsey; the first aider who risked his own life to help a colleague who was buried alive in an enclosed silo full of acidic dust at a power station; a man who was left fighting for his life after an unusual agricultural accident in Northern Ireland; and a couple's holiday in Pembrokeshire that turned to horror when the husband fell over a cliff.