This happened back in the 1990s, while I was jogging through my neighborhood park in the early evening:
A young Latino man dressed in a mariachi band costume (sombrero included) was running towards me. He was a little guy, maybe 4'10" or 4'11", with dark Mexican Indian features. As he approached, I noticed that he smelled like liquor. As he got closer I noticed that the front of his pants was open, his dick was hanging out, and he was urinating. The pee was kind of spraying out and around him as he frantically ran past me.
I ran back to my place and called 911, because I didn't know if this guy was in need of serious assistance or if he might be a danger to others. I gotta give the dispatcher credit -- she kept her cool when I gave a description of the guy ("He's a little less than five feet tall, dark skin, dressed in a mariachi costume...") without scoffing or laughing.
My only guess is that the guy had been a musician or dancer at a wedding in the Latino part of town, got really drunk, wandered up Lincoln Avenue toward my neighborhood, and ended up getting lost.