My dad used to talk about coming home from sailing trips "cold, wet, and frightened". The same happened to me after a short journey by motorcycle. I was riding on a 2 lane section of the Tavistock Road with a 40mph speed limit. The rain was so unusually heavy, the surface conditions so wet and slippery, and the visibility so poor that I was only doing about 30mph. A large, heavy car behind me (I think it was a VW Toerag) was impatient and pulled out into the outside lane and accelerated sharply. He hit a large patch of standing water that was 3 or 4 inched deep and sent up a huge plume of cold dirty spray. As our speeds weren't very different I was hit full-force with a powerful jet of water for a few seconds. I was blinded and deafened by it hitting my visor and helmet. I was instantly drenched and got cold-water-shock (it makes you gasp and flail). The force of the water made the bike very hard to control. I rolled off the throttle, but I didn't apply the brakes because I didn't know what was behind me, or whether I'd stay upright. Thankfully when my vision cleared I hadn't fallen off and I was going in roughly the right direction and still just about in my lane.
I can only think that if I had fallen off in those conditions the next car behind me would have squashed me under its wheels before it saw me.
Richard "super-cub" B