Okay… it’s time to raise the bar and to separate the authentic yogis and yoginis from those of us who are simply insane…
Please snort your pee.
If you actually try this random, internet-based advice from some guy named Yoda who found it on google with absolutely no risk assesment studies in existence, then you are crazy. 
-Yoda
Here’s a cool link re: amaroli in general which mentions the snarfing angle:
http://www.hps-online.com/hurine1.htm
It is said to clean the subtle channels in the head.
-Y