As I got within about 30 feet I could see him zip up his pants and continue walking towards me. Fortunately it was dark under there so I couldn't see him doing his bidness.
As he passed me he smiled drunkenly. When I got to the puddle, which was actually quite sizable, I did a little graceful leap over it, kinda like Gene Kelly -- although I don't think he ever had to jump over a puddle of urine.
Anyway, it reminded me of my dad's old saying: "If there's water on the ground and it hasn't been raining, don't step in it."