Other incidents included a 25-year-old Australian man being arrested for urinating on a shop window and into his own mouth. He was charged with offensive behaviour.
One has to be seriously intoxicated to think that this is a good idea!
On a technical front, I suspect that is quite difficult to do. You would need to have quite a strong flow, point upwards, have good aim, calculate the angle just right for the rebound and also allow for the effect of gravity.