I had my white Specialized S-Works Amira training bike shipped to South Carolina where I'm at a training camp with the Canadian Cycling team. The way the Amira was packed meant that I had to install the handlebars onto the stem of the bike. (The stem connects the handlebars to the steerer tube of the fork) I unscrewed all of the stem's bolts to release the clamp...but I still couldn't get the clamp open, and at first I thought this was a bad thing.
I reefed a little bit on the mysterious carbon fibre clip that was holding the clamp onto the stem, and it came loose - PHEWF. I put my bars on the stem, and replaced the clamp and that mysterious clip. That's when it all became clear.