Heaving, pulling and pushing, you quickly realise the coin is embedded in the rock underneath it.
Undeterred, you still try your best to break it free.
With a mighty pull you finally hear the rock splintering. One final crack and a part of the rock and the coin is free.
With the rock-coin in your hands, you immediately look up. You hear the noise of something, or someone, splashing through the water.
The noise is getting closer.