A man wakes up in the middle of nowhere. He has no money, he doesn’t know where he is and there is absolutely nothing around him, except for a small diner. The man walks towards the diner, where a sign reads “eat all you want, your grandchildren will pay”.
The man walks in, eats like there is no tomorrow and, when he is done, a waitress walks up to him and gives him the bill. “Wait, I read the rules carefully.” says the man.”I know,” replies the waitress “this is your grandfather’s bill.”