Two Steps Forward, One Step Back

So I thought I'd actually try this the other day: a true physical experiment of what happens when you take two steps forward and one step back. I will report that I felt a bit silly carrying out this experiment on the streets of downtown Salt Lake City, but that's where I was walking when the impulse seized me, so I just did it.

Of course, I knew intellectually what would happen. I'm not THAT hopeless at math. I knew the overall trend would be forward. For some reason, though, I just wanted...