I agree that marbles and BBs end up bouncing all over the road. That's why I've practiced, and nearly perfected, the over-the-shoulder throw of a water balloon filled with vasoline. Bit of a pain in the rear to carry on the bike, but when you need it....it's there!

2005 America, green/gray, gutted stock pipes, tall sissy bar w/ luggage rack, Saddleman's dual touring seat and Tourmaster saddlebags (and sissybar bag).