Grandpas $2 Bill

*Knock Knock* You get off the couch and answer your door. Its your grandfather..He came to wish you a happy birthday. Its kind of strange because he usually just calls and thats the end of it. "Thanks.." you say. "No problem" he takes something out of his pocket. "I think its time I gave you this, Ive gotten my fair share out of it." He gives you a crumpled $2 bill. "You dont see these much anymore, they are a bit rare, especially this one." he says. Without another word he turns around and yell...