Nothing says grubby quite like someone else's slightly warm loose change. Though, if you want to kick the grub factor up a notch, putting that loose change in an old, wrinkled plastic sandwich bag and handing it out to trick or treaters should just about do the trick. It's disgusting, dude. Might as well give out a bagful of your toenail clippings. Do yourself and the rest of humanity a favor, spend the ten spot and pick up a bag of candy, you know, so I don't have to be plagued by your grotesque germs.