This is true, a real experiment, and never ceases to amaze me. Years ago, when I was pretty down and out, lost my business, owed the IRS more money than I could ever pay, I was drawn to a transient, that I actually met outside my apartment on the street one Sunday morning in Portland, ME, on a cold, snowy, winter's day as he was clearing snow off his van which had California plates on it. We started talking, then dinner, then more for a few months. He was a recovering alcoholic and addict, five years sober.
My own dark and negative side was apparently in charge at the time we met up, but what a huge mirror he was into my own image and self-contrived awareness at the time. I was angry at the world and hadn't yet accepted my own responsibility in regards to my failed business.
It was the mirror into my own soul that I needed at the time for his negativity and ability to create conflict and chaos so far overshadowed my own, that I finally really saw how I was creating the same negativity in my own life. Yes, he was kind to me, but the outside world was his enemy and it became time to break it off. Sadly, he died a few years later from a heroin overdose. He had sealed his own fate. Thankfully for me, his influence showed me that I didn't want to stay in that negative space!
So, yes, this experiment with water is real and it is amazing the impact that hate, anger and love has on it's essence. And we are each mostly comprised of water!