I once cycled behind a woman on a fixed and she took her feet off the pedals everytime she went through a puddle so her feet didnt get wet, she couldnt get her feet back on as the pedals were spinning round so quick.Cycle through puddles, lift your feet up and go weeeeeeeeeeeeeeeeeeeeeeee!!!!!!!!!!!!!!!!!!!!
If you're not used to riding in the rain, you may be shocked by just how ineffective your brakes are. Be sure to brake ridiculously early, just to get an idea of your stopping power.
BTW, the worst thing about the rain is that all the fair-weather riders disappear, so you have fewer targets to chase down!