a penny for your thoughts

I had a bunch of quarters in my pocket. About six dollars worth, along with a couple of one dollar coins. I pulled all the change out of my pocket and placed it on a desktop. I walked away. A few minutes later, I went to grab the coins so I could bring them to my office and toss them in the coin jar. One of the coins, quarter or dollar I can not say, was standing on its edge. My hand was faster than my brain, so I grabbed all the quarters up, thus knocking down the standing coin. I was therefore unable to test the hypothesis that if you drop some coins somewhere and one stands on edge,…