I have to admit... I'm not particularly into the whole concept of pissing and watersports, but this thread has piqued my interest. What on Earth is "extreme public pissing"?

Is the act of pissing in public extreme in itself? Or are we talking the late 90's Mountain Dew version of "extreme"? You know, some chick repelling off a cliff, on a mountain bike, or skydiving naked while spraying piss out of her puss. I just gotta know.