I was kinda worried about that sound. But I discovered once I got the bike on my repair stand that it was just a stiff link in the chain. I went to the Park Tool site to find out about replacing a chain. Lo and behold, I found out how to simply and easily correct a stiff link with latteral pressure on the chain. It was like "we have a tool for this, but here's how to fix it without the tool." I have only the deepest respect for Park Tool. In the event that I do require specialized tools, they will be at the top of my list.