Count me in with that group, it was fascinating to see the little silver ball move around like water on a greased surface. Remember pushing on it so it would break into two little balls that would come together again.
Not only that, all the old prospectors used to use mercury to pick up the gold out of their pans because it would pick up the gold and leave the junk. Later they could retrieve the Gold. I remember my Uncle doing that when I was a kid(he was a miner before they shut the mines in CA down during WWII) and he panned for gold during the 50s, even though it was illegal(can you believe that sh**?)to own gold at that time thanks the communist a**hat FDR.