So I was riding down the freeway at about 70-75 mph when all of the sudden I heard a loud "click, click, click, click" from the left side of the engine. So I pulled the clutch, which didn't change the sound at all, and pulled off to the side of the freeway. As I was pulling off I tried to downshift. It was very hard to downshift, even with the clutch pulled. All the while I'm still hearing "click, click, click, click". Came to a complete stop on the side of the freeway, and still "click, click, click, click". With the clutch pulled at a complete stop, the bike still wanted to go a little bit, seems as if the clutch was still somehow grabbing a bit. So I killed the engine. Called BMW Roadside Assistance. Got a tow to the dealer. When we arrived at the dealer, they unloaded it off of the tow truck. Then the service manager pulled the dipstick. There were small chunks of metal on the dipstick and in the oil. The chunks were about the size of grains of sand. They're going to open the engine up tomorrow, and see what went wrong and what parts they need to order. In the meantime......Fuck. I had plans to ride this weekend.