“It is seldom that liberty of any kind is lost all at once.” — David Hume.
FedEx guy: Is this really what this is? Rocket fuel?
Me [laughing, used to this reaction from being at the space-travel supply store]: Oh, no, no, no. Of course not. It’s… made-up. Kind of a joke. It’s actually full of sugar, which I just put in to give it some weight, but that’s all it is.
FedEx guy: You can’t ship this.
Me: But… it’s just sugar! What, uh, what if I empty it out? It doesn’t really need to have sugar in it.
FedEx guy: No. They would still x-ray it, and then you’d get a call when it was en route. I don’t think it would make it.
FedEx guy: Nope. You can’t ship these either.
Me: But… they’re empty! It’s just air. And… nitrogen? It’s, like, almost 80% of the atmosphere. There’s nothing dangerous about nitrogen, even if it were pure.
FedEx guy: They look too much like bomb-making materials.