Sometimes it all rolls in like waves, one after another after another after another.
It takes all my concentration to hold myself against the pounding so I brace myself in anticipation of the next, inevitable, wave.
If I slip, stumble or lose my footing, if my concentration wanes or I become distracted then I fall.
The waves that were surging around my legs are now falling over me, I catch my breadth as the next falls and panic starts to grip me.
With all my effort I get to my feet again, and the next wave rolls in.