Sometimes the water decides to do that on its own. I've ridden through Chiang Mai after a heavy rain when the streets were all a foot deep, so you'd get a nice

Sometimes the water decides to do that on its own. I've ridden through Chiang Mai after a heavy rain when the streets were all a foot deep, so you'd get a nice foot wash riding along and despair for your flip flops when stopped. And if you strayed too far from the car in front or cut a corner, you'd find the 4 foot deep drainage ditches and 12 foot deep canals along the sides of the main roads.